Home / 875,269,983.34-1,207,901,386.86-478,783,899.57

Finding the Fourth Proportional to 875,269,983.34, 1,207,901,386.86 and 478,783,899.57

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Solution

The fourth proportional to 875,269,983.34, 1,207,901,386.86 and 478,783,899.57 is: 660,737,540.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,269,983.34 : 1,207,901,386.86 = 478,783,899.57 : x
  2. Step 2: Convert to fraction form
    875,269,983.34/1,207,901,386.86 = 478,783,899.57/x
  3. Step 3: Cross multiply
    875,269,983.34x = 1,207,901,386.86 × 478,783,899.57
  4. Step 4: Simplify right side
    875,269,983.34x = 578,323,736,289,680,512
  5. Step 5: Solve for x
    x = 578,323,736,289,680,512/875,269,983.34
  6. Step 6: Final answer
    x = 660,737,540.76

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Half scale
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Double scale
Find fourth proportional to 875,269,984.34, 1,207,901,388.24 and 478,783,900.57
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.