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Finding the Fourth Proportional to 667.70, 1,001.43 and 234.86

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Solution

The fourth proportional to 667.70, 1,001.43 and 234.86 is: 352.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.70 : 1,001.43 = 234.86 : x
  2. Step 2: Convert to fraction form
    667.70/1,001.43 = 234.86/x
  3. Step 3: Cross multiply
    667.70x = 1,001.43 × 234.86
  4. Step 4: Simplify right side
    667.70x = 235,195.85
  5. Step 5: Solve for x
    x = 235,195.85/667.70
  6. Step 6: Final answer
    x = 352.25

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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.