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Finding the Fourth Proportional to 932.05, 1,397.98 and 315.68

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Solution

The fourth proportional to 932.05, 1,397.98 and 315.68 is: 473.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.05 : 1,397.98 = 315.68 : x
  2. Step 2: Convert to fraction form
    932.05/1,397.98 = 315.68/x
  3. Step 3: Cross multiply
    932.05x = 1,397.98 × 315.68
  4. Step 4: Simplify right side
    932.05x = 441,314.33
  5. Step 5: Solve for x
    x = 441,314.33/932.05
  6. Step 6: Final answer
    x = 473.49

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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.