Home / 3,949.20-5,435.64-3,722.40

Finding the Fourth Proportional to 3,949.20, 5,435.64 and 3,722.40

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Solution

The fourth proportional to 3,949.20, 5,435.64 and 3,722.40 is: 5,123.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.20 : 5,435.64 = 3,722.40 : x
  2. Step 2: Convert to fraction form
    3,949.20/5,435.64 = 3,722.40/x
  3. Step 3: Cross multiply
    3,949.20x = 5,435.64 × 3,722.40
  4. Step 4: Simplify right side
    3,949.20x = 20,233,626.34
  5. Step 5: Solve for x
    x = 20,233,626.34/3,949.20
  6. Step 6: Final answer
    x = 5,123.47

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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.