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Finding the Fourth Proportional to 932.16, 1,286.39 and 512.55

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Solution

The fourth proportional to 932.16, 1,286.39 and 512.55 is: 707.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.16 : 1,286.39 = 512.55 : x
  2. Step 2: Convert to fraction form
    932.16/1,286.39 = 512.55/x
  3. Step 3: Cross multiply
    932.16x = 1,286.39 × 512.55
  4. Step 4: Simplify right side
    932.16x = 659,333.42
  5. Step 5: Solve for x
    x = 659,333.42/932.16
  6. Step 6: Final answer
    x = 707.32

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Double scale
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1.5x scale

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.