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Finding the Fourth Proportional to 202.45, 279.29 and 140.32

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Solution

The fourth proportional to 202.45, 279.29 and 140.32 is: 193.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.45 : 279.29 = 140.32 : x
  2. Step 2: Convert to fraction form
    202.45/279.29 = 140.32/x
  3. Step 3: Cross multiply
    202.45x = 279.29 × 140.32
  4. Step 4: Simplify right side
    202.45x = 39,189.97
  5. Step 5: Solve for x
    x = 39,189.97/202.45
  6. Step 6: Final answer
    x = 193.58

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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.