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Finding the Fourth Proportional to 1,079.56, 1,489.80 and 932.92

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Solution

The fourth proportional to 1,079.56, 1,489.80 and 932.92 is: 1,287.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.56 : 1,489.80 = 932.92 : x
  2. Step 2: Convert to fraction form
    1,079.56/1,489.80 = 932.92/x
  3. Step 3: Cross multiply
    1,079.56x = 1,489.80 × 932.92
  4. Step 4: Simplify right side
    1,079.56x = 1,389,864.22
  5. Step 5: Solve for x
    x = 1,389,864.22/1,079.56
  6. Step 6: Final answer
    x = 1,287.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.