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Finding the Fourth Proportional to 202.42, 279.35 and 115.11

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Solution

The fourth proportional to 202.42, 279.35 and 115.11 is: 158.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.42 : 279.35 = 115.11 : x
  2. Step 2: Convert to fraction form
    202.42/279.35 = 115.11/x
  3. Step 3: Cross multiply
    202.42x = 279.35 × 115.11
  4. Step 4: Simplify right side
    202.42x = 32,155.98
  5. Step 5: Solve for x
    x = 32,155.98/202.42
  6. Step 6: Final answer
    x = 158.86

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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.