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Finding the Fourth Proportional to 398,845.20, 598,138.20 and 132,560.40

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Solution

The fourth proportional to 398,845.20, 598,138.20 and 132,560.40 is: 198,797.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,845.20 : 598,138.20 = 132,560.40 : x
  2. Step 2: Convert to fraction form
    398,845.20/598,138.20 = 132,560.40/x
  3. Step 3: Cross multiply
    398,845.20x = 598,138.20 × 132,560.40
  4. Step 4: Simplify right side
    398,845.20x = 79,289,439,047.28
  5. Step 5: Solve for x
    x = 79,289,439,047.28/398,845.20
  6. Step 6: Final answer
    x = 198,797.53

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1.5x scale

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.