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Finding the Fourth Proportional to 667.86, 1,001.91 and 229.16

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Solution

The fourth proportional to 667.86, 1,001.91 and 229.16 is: 343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.86 : 1,001.91 = 229.16 : x
  2. Step 2: Convert to fraction form
    667.86/1,001.91 = 229.16/x
  3. Step 3: Cross multiply
    667.86x = 1,001.91 × 229.16
  4. Step 4: Simplify right side
    667.86x = 229,595.71
  5. Step 5: Solve for x
    x = 229,595.71/667.86
  6. Step 6: Final answer
    x = 343.78

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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.