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Finding the Fourth Proportional to 398,701.80, 598,052.70 and 132,503.40

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Solution

The fourth proportional to 398,701.80, 598,052.70 and 132,503.40 is: 198,755.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,701.80 : 598,052.70 = 132,503.40 : x
  2. Step 2: Convert to fraction form
    398,701.80/598,052.70 = 132,503.40/x
  3. Step 3: Cross multiply
    398,701.80x = 598,052.70 × 132,503.40
  4. Step 4: Simplify right side
    398,701.80x = 79,244,016,129.18
  5. Step 5: Solve for x
    x = 79,244,016,129.18/398,701.80
  6. Step 6: Final answer
    x = 198,755.10

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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.