Home / 685,388.76-945,836.37-383,582.76

Finding the Fourth Proportional to 685,388.76, 945,836.37 and 383,582.76

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Solution

The fourth proportional to 685,388.76, 945,836.37 and 383,582.76 is: 529,344.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,388.76 : 945,836.37 = 383,582.76 : x
  2. Step 2: Convert to fraction form
    685,388.76/945,836.37 = 383,582.76/x
  3. Step 3: Cross multiply
    685,388.76x = 945,836.37 × 383,582.76
  4. Step 4: Simplify right side
    685,388.76x = 362,806,525,312.98
  5. Step 5: Solve for x
    x = 362,806,525,312.98/685,388.76
  6. Step 6: Final answer
    x = 529,344.14

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.