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Finding the Fourth Proportional to 287,557.90, 431,336.85 and 252,565.90

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Solution

The fourth proportional to 287,557.90, 431,336.85 and 252,565.90 is: 378,848.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,557.90 : 431,336.85 = 252,565.90 : x
  2. Step 2: Convert to fraction form
    287,557.90/431,336.85 = 252,565.90/x
  3. Step 3: Cross multiply
    287,557.90x = 431,336.85 × 252,565.90
  4. Step 4: Simplify right side
    287,557.90x = 108,940,979,723.42
  5. Step 5: Solve for x
    x = 108,940,979,723.42/287,557.90
  6. Step 6: Final answer
    x = 378,848.85

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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.