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Finding the Fourth Proportional to 5,149.20, 7,726.20 and 3,853.20

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Solution

The fourth proportional to 5,149.20, 7,726.20 and 3,853.20 is: 5,781.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,149.20 : 7,726.20 = 3,853.20 : x
  2. Step 2: Convert to fraction form
    5,149.20/7,726.20 = 3,853.20/x
  3. Step 3: Cross multiply
    5,149.20x = 7,726.20 × 3,853.20
  4. Step 4: Simplify right side
    5,149.20x = 29,770,593.84
  5. Step 5: Solve for x
    x = 29,770,593.84/5,149.20
  6. Step 6: Final answer
    x = 5,781.60

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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.