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Finding the Fourth Proportional to 437,129.80, 655,694.70 and 398,422.60

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Solution

The fourth proportional to 437,129.80, 655,694.70 and 398,422.60 is: 597,633.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,129.80 : 655,694.70 = 398,422.60 : x
  2. Step 2: Convert to fraction form
    437,129.80/655,694.70 = 398,422.60/x
  3. Step 3: Cross multiply
    437,129.80x = 655,694.70 × 398,422.60
  4. Step 4: Simplify right side
    437,129.80x = 261,243,587,180.22
  5. Step 5: Solve for x
    x = 261,243,587,180.22/437,129.80
  6. Step 6: Final answer
    x = 597,633.90

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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.