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Finding the Fourth Proportional to 814.15, 1,221.31 and 237.03

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Solution

The fourth proportional to 814.15, 1,221.31 and 237.03 is: 355.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.15 : 1,221.31 = 237.03 : x
  2. Step 2: Convert to fraction form
    814.15/1,221.31 = 237.03/x
  3. Step 3: Cross multiply
    814.15x = 1,221.31 × 237.03
  4. Step 4: Simplify right side
    814.15x = 289,487.11
  5. Step 5: Solve for x
    x = 289,487.11/814.15
  6. Step 6: Final answer
    x = 355.57

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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.