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Finding the Fourth Proportional to 356.97, 535.46 and 140.57

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Solution

The fourth proportional to 356.97, 535.46 and 140.57 is: 210.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.97 : 535.46 = 140.57 : x
  2. Step 2: Convert to fraction form
    356.97/535.46 = 140.57/x
  3. Step 3: Cross multiply
    356.97x = 535.46 × 140.57
  4. Step 4: Simplify right side
    356.97x = 75,269.61
  5. Step 5: Solve for x
    x = 75,269.61/356.97
  6. Step 6: Final answer
    x = 210.86

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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.