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Finding the Fourth Proportional to 356.76, 535.17 and 140.28

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Solution

The fourth proportional to 356.76, 535.17 and 140.28 is: 210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.76 : 535.17 = 140.28 : x
  2. Step 2: Convert to fraction form
    356.76/535.17 = 140.28/x
  3. Step 3: Cross multiply
    356.76x = 535.17 × 140.28
  4. Step 4: Simplify right side
    356.76x = 75,074.28
  5. Step 5: Solve for x
    x = 75,074.28/356.76
  6. Step 6: Final answer
    x = 210.44

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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.