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Finding the Fourth Proportional to 408,725.92, 613,192.56 and 128,245.60

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Solution

The fourth proportional to 408,725.92, 613,192.56 and 128,245.60 is: 192,400.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,725.92 : 613,192.56 = 128,245.60 : x
  2. Step 2: Convert to fraction form
    408,725.92/613,192.56 = 128,245.60/x
  3. Step 3: Cross multiply
    408,725.92x = 613,192.56 × 128,245.60
  4. Step 4: Simplify right side
    408,725.92x = 78,639,247,772.74
  5. Step 5: Solve for x
    x = 78,639,247,772.74/408,725.92
  6. Step 6: Final answer
    x = 192,400.93

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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.