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Finding the Fourth Proportional to 3,149.80, 4,720.82 and 1,392.92

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Solution

The fourth proportional to 3,149.80, 4,720.82 and 1,392.92 is: 2,087.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.80 : 4,720.82 = 1,392.92 : x
  2. Step 2: Convert to fraction form
    3,149.80/4,720.82 = 1,392.92/x
  3. Step 3: Cross multiply
    3,149.80x = 4,720.82 × 1,392.92
  4. Step 4: Simplify right side
    3,149.80x = 6,575,724.59
  5. Step 5: Solve for x
    x = 6,575,724.59/3,149.80
  6. Step 6: Final answer
    x = 2,087.66

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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.