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Finding the Fourth Proportional to 207.71, 311.85 and 135.04

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Solution

The fourth proportional to 207.71, 311.85 and 135.04 is: 202.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.71 : 311.85 = 135.04 : x
  2. Step 2: Convert to fraction form
    207.71/311.85 = 135.04/x
  3. Step 3: Cross multiply
    207.71x = 311.85 × 135.04
  4. Step 4: Simplify right side
    207.71x = 42,112.22
  5. Step 5: Solve for x
    x = 42,112.22/207.71
  6. Step 6: Final answer
    x = 202.75

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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.