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Finding the Fourth Proportional to 814.86, 1,221.53 and 294.73

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Solution

The fourth proportional to 814.86, 1,221.53 and 294.73 is: 441.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.86 : 1,221.53 = 294.73 : x
  2. Step 2: Convert to fraction form
    814.86/1,221.53 = 294.73/x
  3. Step 3: Cross multiply
    814.86x = 1,221.53 × 294.73
  4. Step 4: Simplify right side
    814.86x = 360,017.01
  5. Step 5: Solve for x
    x = 360,017.01/814.86
  6. Step 6: Final answer
    x = 441.81

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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.