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Finding the Fourth Proportional to 732.80, 1,098.81 and 385.31

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Solution

The fourth proportional to 732.80, 1,098.81 and 385.31 is: 577.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.80 : 1,098.81 = 385.31 : x
  2. Step 2: Convert to fraction form
    732.80/1,098.81 = 385.31/x
  3. Step 3: Cross multiply
    732.80x = 1,098.81 × 385.31
  4. Step 4: Simplify right side
    732.80x = 423,385.23
  5. Step 5: Solve for x
    x = 423,385.23/732.80
  6. Step 6: Final answer
    x = 577.76

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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.