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Finding the Fourth Proportional to 408,132.69, 612,375.38 and 155,489.07

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Solution

The fourth proportional to 408,132.69, 612,375.38 and 155,489.07 is: 233,300.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,132.69 : 612,375.38 = 155,489.07 : x
  2. Step 2: Convert to fraction form
    408,132.69/612,375.38 = 155,489.07/x
  3. Step 3: Cross multiply
    408,132.69x = 612,375.38 × 155,489.07
  4. Step 4: Simplify right side
    408,132.69x = 95,217,678,327.10
  5. Step 5: Solve for x
    x = 95,217,678,327.10/408,132.69
  6. Step 6: Final answer
    x = 233,300.79

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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.