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Finding the Fourth Proportional to 732.48, 1,092.72 and 669.60

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Solution

The fourth proportional to 732.48, 1,092.72 and 669.60 is: 998.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.48 : 1,092.72 = 669.60 : x
  2. Step 2: Convert to fraction form
    732.48/1,092.72 = 669.60/x
  3. Step 3: Cross multiply
    732.48x = 1,092.72 × 669.60
  4. Step 4: Simplify right side
    732.48x = 731,685.31
  5. Step 5: Solve for x
    x = 731,685.31/732.48
  6. Step 6: Final answer
    x = 998.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.