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Finding the Fourth Proportional to 932.38, 1,286.11 and 578.48

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Solution

The fourth proportional to 932.38, 1,286.11 and 578.48 is: 797.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.38 : 1,286.11 = 578.48 : x
  2. Step 2: Convert to fraction form
    932.38/1,286.11 = 578.48/x
  3. Step 3: Cross multiply
    932.38x = 1,286.11 × 578.48
  4. Step 4: Simplify right side
    932.38x = 743,983.21
  5. Step 5: Solve for x
    x = 743,983.21/932.38
  6. Step 6: Final answer
    x = 797.94

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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.