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Finding the Fourth Proportional to 932.66, 1,287 and 512.92

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Solution

The fourth proportional to 932.66, 1,287 and 512.92 is: 707.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.66 : 1,287 = 512.92 : x
  2. Step 2: Convert to fraction form
    932.66/1,287 = 512.92/x
  3. Step 3: Cross multiply
    932.66x = 1,287 × 512.92
  4. Step 4: Simplify right side
    932.66x = 660,128.04
  5. Step 5: Solve for x
    x = 660,128.04/932.66
  6. Step 6: Final answer
    x = 707.79

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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.