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Finding the Fourth Proportional to 3,931.80, 5,414.22 and 3,368.04

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Solution

The fourth proportional to 3,931.80, 5,414.22 and 3,368.04 is: 4,637.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.80 : 5,414.22 = 3,368.04 : x
  2. Step 2: Convert to fraction form
    3,931.80/5,414.22 = 3,368.04/x
  3. Step 3: Cross multiply
    3,931.80x = 5,414.22 × 3,368.04
  4. Step 4: Simplify right side
    3,931.80x = 18,235,309.53
  5. Step 5: Solve for x
    x = 18,235,309.53/3,931.80
  6. Step 6: Final answer
    x = 4,637.90

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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.