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Finding the Fourth Proportional to 932.96, 1,286.88 and 723.32

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Solution

The fourth proportional to 932.96, 1,286.88 and 723.32 is: 997.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.96 : 1,286.88 = 723.32 : x
  2. Step 2: Convert to fraction form
    932.96/1,286.88 = 723.32/x
  3. Step 3: Cross multiply
    932.96x = 1,286.88 × 723.32
  4. Step 4: Simplify right side
    932.96x = 930,826.04
  5. Step 5: Solve for x
    x = 930,826.04/932.96
  6. Step 6: Final answer
    x = 997.71

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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.