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Finding the Fourth Proportional to 932.52, 1,286.55 and 666.99

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Solution

The fourth proportional to 932.52, 1,286.55 and 666.99 is: 920.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.52 : 1,286.55 = 666.99 : x
  2. Step 2: Convert to fraction form
    932.52/1,286.55 = 666.99/x
  3. Step 3: Cross multiply
    932.52x = 1,286.55 × 666.99
  4. Step 4: Simplify right side
    932.52x = 858,115.98
  5. Step 5: Solve for x
    x = 858,115.98/932.52
  6. Step 6: Final answer
    x = 920.21

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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.