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Finding the Fourth Proportional to 408,862.80, 613,294.20 and 209,116.80

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Solution

The fourth proportional to 408,862.80, 613,294.20 and 209,116.80 is: 313,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,862.80 : 613,294.20 = 209,116.80 : x
  2. Step 2: Convert to fraction form
    408,862.80/613,294.20 = 209,116.80/x
  3. Step 3: Cross multiply
    408,862.80x = 613,294.20 × 209,116.80
  4. Step 4: Simplify right side
    408,862.80x = 128,250,120,562.56
  5. Step 5: Solve for x
    x = 128,250,120,562.56/408,862.80
  6. Step 6: Final answer
    x = 313,675.20

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Similar ratio
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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.