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Finding the Fourth Proportional to 932.73, 1,287.19 and 559.72

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Solution

The fourth proportional to 932.73, 1,287.19 and 559.72 is: 772.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.73 : 1,287.19 = 559.72 : x
  2. Step 2: Convert to fraction form
    932.73/1,287.19 = 559.72/x
  3. Step 3: Cross multiply
    932.73x = 1,287.19 × 559.72
  4. Step 4: Simplify right side
    932.73x = 720,465.99
  5. Step 5: Solve for x
    x = 720,465.99/932.73
  6. Step 6: Final answer
    x = 772.43

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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.