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Finding the Fourth Proportional to 356.88, 535.16 and 140.42

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Solution

The fourth proportional to 356.88, 535.16 and 140.42 is: 210.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.88 : 535.16 = 140.42 : x
  2. Step 2: Convert to fraction form
    356.88/535.16 = 140.42/x
  3. Step 3: Cross multiply
    356.88x = 535.16 × 140.42
  4. Step 4: Simplify right side
    356.88x = 75,147.17
  5. Step 5: Solve for x
    x = 75,147.17/356.88
  6. Step 6: Final answer
    x = 210.57

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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.