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Finding the Fourth Proportional to 529,691.91, 730,989.24 and 287,990.73

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Solution

The fourth proportional to 529,691.91, 730,989.24 and 287,990.73 is: 397,435.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,691.91 : 730,989.24 = 287,990.73 : x
  2. Step 2: Convert to fraction form
    529,691.91/730,989.24 = 287,990.73/x
  3. Step 3: Cross multiply
    529,691.91x = 730,989.24 × 287,990.73
  4. Step 4: Simplify right side
    529,691.91x = 210,518,124,849.75
  5. Step 5: Solve for x
    x = 210,518,124,849.75/529,691.91
  6. Step 6: Final answer
    x = 397,435.04

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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.