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Finding the Fourth Proportional to 202.59, 279.54 and 140.49

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Solution

The fourth proportional to 202.59, 279.54 and 140.49 is: 193.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.59 : 279.54 = 140.49 : x
  2. Step 2: Convert to fraction form
    202.59/279.54 = 140.49/x
  3. Step 3: Cross multiply
    202.59x = 279.54 × 140.49
  4. Step 4: Simplify right side
    202.59x = 39,272.57
  5. Step 5: Solve for x
    x = 39,272.57/202.59
  6. Step 6: Final answer
    x = 193.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.