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Finding the Fourth Proportional to 713,398.92, 984,490.27 and 391,102.10

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Solution

The fourth proportional to 713,398.92, 984,490.27 and 391,102.10 is: 539,720.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,398.92 : 984,490.27 = 391,102.10 : x
  2. Step 2: Convert to fraction form
    713,398.92/984,490.27 = 391,102.10/x
  3. Step 3: Cross multiply
    713,398.92x = 984,490.27 × 391,102.10
  4. Step 4: Simplify right side
    713,398.92x = 385,036,209,818.20
  5. Step 5: Solve for x
    x = 385,036,209,818.20/713,398.92
  6. Step 6: Final answer
    x = 539,720.77

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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.