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Finding the Fourth Proportional to 721.92, 1,083.03 and 235.31

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Solution

The fourth proportional to 721.92, 1,083.03 and 235.31 is: 353.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.92 : 1,083.03 = 235.31 : x
  2. Step 2: Convert to fraction form
    721.92/1,083.03 = 235.31/x
  3. Step 3: Cross multiply
    721.92x = 1,083.03 × 235.31
  4. Step 4: Simplify right side
    721.92x = 254,847.79
  5. Step 5: Solve for x
    x = 254,847.79/721.92
  6. Step 6: Final answer
    x = 353.01

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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.