Home / 3,149.70-4,349.34-1,972.80

Finding the Fourth Proportional to 3,149.70, 4,349.34 and 1,972.80

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Solution

The fourth proportional to 3,149.70, 4,349.34 and 1,972.80 is: 2,724.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.70 : 4,349.34 = 1,972.80 : x
  2. Step 2: Convert to fraction form
    3,149.70/4,349.34 = 1,972.80/x
  3. Step 3: Cross multiply
    3,149.70x = 4,349.34 × 1,972.80
  4. Step 4: Simplify right side
    3,149.70x = 8,580,377.95
  5. Step 5: Solve for x
    x = 8,580,377.95/3,149.70
  6. Step 6: Final answer
    x = 2,724.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.