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Finding the Fourth Proportional to 396,990.48, 595,508 and 127,142.40

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Solution

The fourth proportional to 396,990.48, 595,508 and 127,142.40 is: 190,720.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,990.48 : 595,508 = 127,142.40 : x
  2. Step 2: Convert to fraction form
    396,990.48/595,508 = 127,142.40/x
  3. Step 3: Cross multiply
    396,990.48x = 595,508 × 127,142.40
  4. Step 4: Simplify right side
    396,990.48x = 75,714,316,339.20
  5. Step 5: Solve for x
    x = 75,714,316,339.20/396,990.48
  6. Step 6: Final answer
    x = 190,720.74

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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.