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Finding the Fourth Proportional to 398,481.12, 597,720.60 and 132,261.66

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Solution

The fourth proportional to 398,481.12, 597,720.60 and 132,261.66 is: 198,392.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,481.12 : 597,720.60 = 132,261.66 : x
  2. Step 2: Convert to fraction form
    398,481.12/597,720.60 = 132,261.66/x
  3. Step 3: Cross multiply
    398,481.12x = 597,720.60 × 132,261.66
  4. Step 4: Simplify right side
    398,481.12x = 79,055,518,772.20
  5. Step 5: Solve for x
    x = 79,055,518,772.20/398,481.12
  6. Step 6: Final answer
    x = 198,392.13

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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.