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Finding the Fourth Proportional to 932.97, 1,399.61 and 316.75

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Solution

The fourth proportional to 932.97, 1,399.61 and 316.75 is: 475.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.97 : 1,399.61 = 316.75 : x
  2. Step 2: Convert to fraction form
    932.97/1,399.61 = 316.75/x
  3. Step 3: Cross multiply
    932.97x = 1,399.61 × 316.75
  4. Step 4: Simplify right side
    932.97x = 443,326.47
  5. Step 5: Solve for x
    x = 443,326.47/932.97
  6. Step 6: Final answer
    x = 475.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.