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Finding the Fourth Proportional to 266,515.47, 399,714.50 and 76,934.66

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Solution

The fourth proportional to 266,515.47, 399,714.50 and 76,934.66 is: 115,385.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,515.47 : 399,714.50 = 76,934.66 : x
  2. Step 2: Convert to fraction form
    266,515.47/399,714.50 = 76,934.66/x
  3. Step 3: Cross multiply
    266,515.47x = 399,714.50 × 76,934.66
  4. Step 4: Simplify right side
    266,515.47x = 30,751,899,163.97
  5. Step 5: Solve for x
    x = 30,751,899,163.97/266,515.47
  6. Step 6: Final answer
    x = 115,385.04

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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.