Home / 3,902.20-5,385.14-2,331.20

Finding the Fourth Proportional to 3,902.20, 5,385.14 and 2,331.20

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Solution

The fourth proportional to 3,902.20, 5,385.14 and 2,331.20 is: 3,217.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.20 : 5,385.14 = 2,331.20 : x
  2. Step 2: Convert to fraction form
    3,902.20/5,385.14 = 2,331.20/x
  3. Step 3: Cross multiply
    3,902.20x = 5,385.14 × 2,331.20
  4. Step 4: Simplify right side
    3,902.20x = 12,553,838.37
  5. Step 5: Solve for x
    x = 12,553,838.37/3,902.20
  6. Step 6: Final answer
    x = 3,217.12

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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.