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Finding the Fourth Proportional to 398,846.20, 598,139.70 and 132,561.40

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Solution

The fourth proportional to 398,846.20, 598,139.70 and 132,561.40 is: 198,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,846.20 : 598,139.70 = 132,561.40 : x
  2. Step 2: Convert to fraction form
    398,846.20/598,139.70 = 132,561.40/x
  3. Step 3: Cross multiply
    398,846.20x = 598,139.70 × 132,561.40
  4. Step 4: Simplify right side
    398,846.20x = 79,290,236,027.58
  5. Step 5: Solve for x
    x = 79,290,236,027.58/398,846.20
  6. Step 6: Final answer
    x = 198,799.03

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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.