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Finding the Fourth Proportional to 423.61, 635.38 and 167.11

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Solution

The fourth proportional to 423.61, 635.38 and 167.11 is: 250.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.61 : 635.38 = 167.11 : x
  2. Step 2: Convert to fraction form
    423.61/635.38 = 167.11/x
  3. Step 3: Cross multiply
    423.61x = 635.38 × 167.11
  4. Step 4: Simplify right side
    423.61x = 106,178.35
  5. Step 5: Solve for x
    x = 106,178.35/423.61
  6. Step 6: Final answer
    x = 250.65

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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.