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Finding the Fourth Proportional to 408,724.92, 613,191.06 and 128,244.60

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Solution

The fourth proportional to 408,724.92, 613,191.06 and 128,244.60 is: 192,399.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,724.92 : 613,191.06 = 128,244.60 : x
  2. Step 2: Convert to fraction form
    408,724.92/613,191.06 = 128,244.60/x
  3. Step 3: Cross multiply
    408,724.92x = 613,191.06 × 128,244.60
  4. Step 4: Simplify right side
    408,724.92x = 78,638,442,213.28
  5. Step 5: Solve for x
    x = 78,638,442,213.28/408,724.92
  6. Step 6: Final answer
    x = 192,399.43

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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.