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Finding the Fourth Proportional to 408,549.80, 612,923.11 and 128,067.05

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Solution

The fourth proportional to 408,549.80, 612,923.11 and 128,067.05 is: 192,131.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,549.80 : 612,923.11 = 128,067.05 : x
  2. Step 2: Convert to fraction form
    408,549.80/612,923.11 = 128,067.05/x
  3. Step 3: Cross multiply
    408,549.80x = 612,923.11 × 128,067.05
  4. Step 4: Simplify right side
    408,549.80x = 78,495,251,189.74
  5. Step 5: Solve for x
    x = 78,495,251,189.74/408,549.80
  6. Step 6: Final answer
    x = 192,131.42

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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.