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Finding the Fourth Proportional to 422.57, 633.68 and 141.06

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Solution

The fourth proportional to 422.57, 633.68 and 141.06 is: 211.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.57 : 633.68 = 141.06 : x
  2. Step 2: Convert to fraction form
    422.57/633.68 = 141.06/x
  3. Step 3: Cross multiply
    422.57x = 633.68 × 141.06
  4. Step 4: Simplify right side
    422.57x = 89,386.20
  5. Step 5: Solve for x
    x = 89,386.20/422.57
  6. Step 6: Final answer
    x = 211.53

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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.