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Finding the Fourth Proportional to 566,487.92, 781,781.40 and 311,836.40

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Solution

The fourth proportional to 566,487.92, 781,781.40 and 311,836.40 is: 430,349.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,487.92 : 781,781.40 = 311,836.40 : x
  2. Step 2: Convert to fraction form
    566,487.92/781,781.40 = 311,836.40/x
  3. Step 3: Cross multiply
    566,487.92x = 781,781.40 × 311,836.40
  4. Step 4: Simplify right side
    566,487.92x = 243,787,897,362.96
  5. Step 5: Solve for x
    x = 243,787,897,362.96/566,487.92
  6. Step 6: Final answer
    x = 430,349.68

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Double scale
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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.