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Finding the Fourth Proportional to 928.71, 1,281.62 and 633.97

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Solution

The fourth proportional to 928.71, 1,281.62 and 633.97 is: 874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.71 : 1,281.62 = 633.97 : x
  2. Step 2: Convert to fraction form
    928.71/1,281.62 = 633.97/x
  3. Step 3: Cross multiply
    928.71x = 1,281.62 × 633.97
  4. Step 4: Simplify right side
    928.71x = 812,502.22
  5. Step 5: Solve for x
    x = 812,502.22/928.71
  6. Step 6: Final answer
    x = 874.88

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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.