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Finding the Fourth Proportional to 266,721.80, 400,082.70 and 220,641.80

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Solution

The fourth proportional to 266,721.80, 400,082.70 and 220,641.80 is: 330,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,721.80 : 400,082.70 = 220,641.80 : x
  2. Step 2: Convert to fraction form
    266,721.80/400,082.70 = 220,641.80/x
  3. Step 3: Cross multiply
    266,721.80x = 400,082.70 × 220,641.80
  4. Step 4: Simplify right side
    266,721.80x = 88,274,967,076.86
  5. Step 5: Solve for x
    x = 88,274,967,076.86/266,721.80
  6. Step 6: Final answer
    x = 330,962.70

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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.