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Finding the Fourth Proportional to 408,925.80, 613,407.90 and 128,452.20

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Solution

The fourth proportional to 408,925.80, 613,407.90 and 128,452.20 is: 192,684.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,925.80 : 613,407.90 = 128,452.20 : x
  2. Step 2: Convert to fraction form
    408,925.80/613,407.90 = 128,452.20/x
  3. Step 3: Cross multiply
    408,925.80x = 613,407.90 × 128,452.20
  4. Step 4: Simplify right side
    408,925.80x = 78,793,594,252.38
  5. Step 5: Solve for x
    x = 78,793,594,252.38/408,925.80
  6. Step 6: Final answer
    x = 192,684.33

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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.