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Finding the Fourth Proportional to 499,695.89, 748,342.80 and 285,815.39

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Solution

The fourth proportional to 499,695.89, 748,342.80 and 285,815.39 is: 428,036.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,695.89 : 748,342.80 = 285,815.39 : x
  2. Step 2: Convert to fraction form
    499,695.89/748,342.80 = 285,815.39/x
  3. Step 3: Cross multiply
    499,695.89x = 748,342.80 × 285,815.39
  4. Step 4: Simplify right side
    499,695.89x = 213,887,885,493.98
  5. Step 5: Solve for x
    x = 213,887,885,493.98/499,695.89
  6. Step 6: Final answer
    x = 428,036.12

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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.