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Finding the Fourth Proportional to 529,812.30, 731,213.55 and 402,285.90

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Solution

The fourth proportional to 529,812.30, 731,213.55 and 402,285.90 is: 555,209.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,812.30 : 731,213.55 = 402,285.90 : x
  2. Step 2: Convert to fraction form
    529,812.30/731,213.55 = 402,285.90/x
  3. Step 3: Cross multiply
    529,812.30x = 731,213.55 × 402,285.90
  4. Step 4: Simplify right side
    529,812.30x = 294,156,901,053.95
  5. Step 5: Solve for x
    x = 294,156,901,053.95/529,812.30
  6. Step 6: Final answer
    x = 555,209.65

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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.