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Finding the Fourth Proportional to 932.39, 1,286.64 and 559.55

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Solution

The fourth proportional to 932.39, 1,286.64 and 559.55 is: 772.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.39 : 1,286.64 = 559.55 : x
  2. Step 2: Convert to fraction form
    932.39/1,286.64 = 559.55/x
  3. Step 3: Cross multiply
    932.39x = 1,286.64 × 559.55
  4. Step 4: Simplify right side
    932.39x = 719,939.41
  5. Step 5: Solve for x
    x = 719,939.41/932.39
  6. Step 6: Final answer
    x = 772.14

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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.