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Finding the Fourth Proportional to 518,717.30, 777,201.15 and 429,487.70

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Solution

The fourth proportional to 518,717.30, 777,201.15 and 429,487.70 is: 643,507.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,717.30 : 777,201.15 = 429,487.70 : x
  2. Step 2: Convert to fraction form
    518,717.30/777,201.15 = 429,487.70/x
  3. Step 3: Cross multiply
    518,717.30x = 777,201.15 × 429,487.70
  4. Step 4: Simplify right side
    518,717.30x = 333,798,334,350.86
  5. Step 5: Solve for x
    x = 333,798,334,350.86/518,717.30
  6. Step 6: Final answer
    x = 643,507.23

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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.