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Finding the Fourth Proportional to 932.87, 1,286.90 and 559.77

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Solution

The fourth proportional to 932.87, 1,286.90 and 559.77 is: 772.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.87 : 1,286.90 = 559.77 : x
  2. Step 2: Convert to fraction form
    932.87/1,286.90 = 559.77/x
  3. Step 3: Cross multiply
    932.87x = 1,286.90 × 559.77
  4. Step 4: Simplify right side
    932.87x = 720,365.21
  5. Step 5: Solve for x
    x = 720,365.21/932.87
  6. Step 6: Final answer
    x = 772.21

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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.