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Finding the Fourth Proportional to 356.62, 534.36 and 140.08

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Solution

The fourth proportional to 356.62, 534.36 and 140.08 is: 209.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.62 : 534.36 = 140.08 : x
  2. Step 2: Convert to fraction form
    356.62/534.36 = 140.08/x
  3. Step 3: Cross multiply
    356.62x = 534.36 × 140.08
  4. Step 4: Simplify right side
    356.62x = 74,853.15
  5. Step 5: Solve for x
    x = 74,853.15/356.62
  6. Step 6: Final answer
    x = 209.90

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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.