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Finding the Fourth Proportional to 736.31, 1,104.92 and 660.68

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Solution

The fourth proportional to 736.31, 1,104.92 and 660.68 is: 991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.31 : 1,104.92 = 660.68 : x
  2. Step 2: Convert to fraction form
    736.31/1,104.92 = 660.68/x
  3. Step 3: Cross multiply
    736.31x = 1,104.92 × 660.68
  4. Step 4: Simplify right side
    736.31x = 729,997.43
  5. Step 5: Solve for x
    x = 729,997.43/736.31
  6. Step 6: Final answer
    x = 991.42

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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.