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Finding the Fourth Proportional to 773.97, 1,160.06 and 427.52

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Solution

The fourth proportional to 773.97, 1,160.06 and 427.52 is: 640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.97 : 1,160.06 = 427.52 : x
  2. Step 2: Convert to fraction form
    773.97/1,160.06 = 427.52/x
  3. Step 3: Cross multiply
    773.97x = 1,160.06 × 427.52
  4. Step 4: Simplify right side
    773.97x = 495,940.91
  5. Step 5: Solve for x
    x = 495,940.91/773.97
  6. Step 6: Final answer
    x = 640.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.