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Finding the Fourth Proportional to 266,561.28, 399,375.36 and 155,520

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Solution

The fourth proportional to 266,561.28, 399,375.36 and 155,520 is: 233,007.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,561.28 : 399,375.36 = 155,520 : x
  2. Step 2: Convert to fraction form
    266,561.28/399,375.36 = 155,520/x
  3. Step 3: Cross multiply
    266,561.28x = 399,375.36 × 155,520
  4. Step 4: Simplify right side
    266,561.28x = 62,110,855,987.20
  5. Step 5: Solve for x
    x = 62,110,855,987.20/266,561.28
  6. Step 6: Final answer
    x = 233,007.79

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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.