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Finding the Fourth Proportional to 927.28, 1,279.92 and 753.04

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Solution

The fourth proportional to 927.28, 1,279.92 and 753.04 is: 1,039.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.28 : 1,279.92 = 753.04 : x
  2. Step 2: Convert to fraction form
    927.28/1,279.92 = 753.04/x
  3. Step 3: Cross multiply
    927.28x = 1,279.92 × 753.04
  4. Step 4: Simplify right side
    927.28x = 963,830.96
  5. Step 5: Solve for x
    x = 963,830.96/927.28
  6. Step 6: Final answer
    x = 1,039.42

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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.