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Finding the Fourth Proportional to 266,813.20, 400,279.50 and 140,512.90

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Solution

The fourth proportional to 266,813.20, 400,279.50 and 140,512.90 is: 210,800.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,813.20 : 400,279.50 = 140,512.90 : x
  2. Step 2: Convert to fraction form
    266,813.20/400,279.50 = 140,512.90/x
  3. Step 3: Cross multiply
    266,813.20x = 400,279.50 × 140,512.90
  4. Step 4: Simplify right side
    266,813.20x = 56,244,433,355.55
  5. Step 5: Solve for x
    x = 56,244,433,355.55/266,813.20
  6. Step 6: Final answer
    x = 210,800.79

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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.