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Finding the Fourth Proportional to 408,593.13, 612,889.70 and 128,132.25

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Solution

The fourth proportional to 408,593.13, 612,889.70 and 128,132.25 is: 192,198.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,593.13 : 612,889.70 = 128,132.25 : x
  2. Step 2: Convert to fraction form
    408,593.13/612,889.70 = 128,132.25/x
  3. Step 3: Cross multiply
    408,593.13x = 612,889.70 × 128,132.25
  4. Step 4: Simplify right side
    408,593.13x = 78,530,935,622.16
  5. Step 5: Solve for x
    x = 78,530,935,622.16/408,593.13
  6. Step 6: Final answer
    x = 192,198.38

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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.