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Finding the Fourth Proportional to 266,380.40, 399,569.52 and 126,237.44

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Solution

The fourth proportional to 266,380.40, 399,569.52 and 126,237.44 is: 189,355.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,380.40 : 399,569.52 = 126,237.44 : x
  2. Step 2: Convert to fraction form
    266,380.40/399,569.52 = 126,237.44/x
  3. Step 3: Cross multiply
    266,380.40x = 399,569.52 × 126,237.44
  4. Step 4: Simplify right side
    266,380.40x = 50,440,633,306.83
  5. Step 5: Solve for x
    x = 50,440,633,306.83/266,380.40
  6. Step 6: Final answer
    x = 189,355.65

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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.