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Finding the Fourth Proportional to 827,908.80, 1,242,079.20 and 266,956.80

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Solution

The fourth proportional to 827,908.80, 1,242,079.20 and 266,956.80 is: 400,504.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,908.80 : 1,242,079.20 = 266,956.80 : x
  2. Step 2: Convert to fraction form
    827,908.80/1,242,079.20 = 266,956.80/x
  3. Step 3: Cross multiply
    827,908.80x = 1,242,079.20 × 266,956.80
  4. Step 4: Simplify right side
    827,908.80x = 331,581,488,578.56
  5. Step 5: Solve for x
    x = 331,581,488,578.56/827,908.80
  6. Step 6: Final answer
    x = 400,504.85

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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.