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Finding the Fourth Proportional to 666,987.68, 1,001,020.98 and 516,872

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Solution

The fourth proportional to 666,987.68, 1,001,020.98 and 516,872 is: 775,726.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,987.68 : 1,001,020.98 = 516,872 : x
  2. Step 2: Convert to fraction form
    666,987.68/1,001,020.98 = 516,872/x
  3. Step 3: Cross multiply
    666,987.68x = 1,001,020.98 × 516,872
  4. Step 4: Simplify right side
    666,987.68x = 517,399,715,974.56
  5. Step 5: Solve for x
    x = 517,399,715,974.56/666,987.68
  6. Step 6: Final answer
    x = 775,726.05

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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.