Home / 806,803.80-1,210,205.70-386,899.80

Finding the Fourth Proportional to 806,803.80, 1,210,205.70 and 386,899.80

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Solution

The fourth proportional to 806,803.80, 1,210,205.70 and 386,899.80 is: 580,349.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,803.80 : 1,210,205.70 = 386,899.80 : x
  2. Step 2: Convert to fraction form
    806,803.80/1,210,205.70 = 386,899.80/x
  3. Step 3: Cross multiply
    806,803.80x = 1,210,205.70 × 386,899.80
  4. Step 4: Simplify right side
    806,803.80x = 468,228,343,288.86
  5. Step 5: Solve for x
    x = 468,228,343,288.86/806,803.80
  6. Step 6: Final answer
    x = 580,349.70

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.