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Finding the Fourth Proportional to 723.97, 1,085.92 and 503.96

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Solution

The fourth proportional to 723.97, 1,085.92 and 503.96 is: 755.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.97 : 1,085.92 = 503.96 : x
  2. Step 2: Convert to fraction form
    723.97/1,085.92 = 503.96/x
  3. Step 3: Cross multiply
    723.97x = 1,085.92 × 503.96
  4. Step 4: Simplify right side
    723.97x = 547,252.29
  5. Step 5: Solve for x
    x = 547,252.29/723.97
  6. Step 6: Final answer
    x = 755.90

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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.