Home / 3,712.28-5,122.85-2,219.45

Finding the Fourth Proportional to 3,712.28, 5,122.85 and 2,219.45

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Solution

The fourth proportional to 3,712.28, 5,122.85 and 2,219.45 is: 3,062.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.28 : 5,122.85 = 2,219.45 : x
  2. Step 2: Convert to fraction form
    3,712.28/5,122.85 = 2,219.45/x
  3. Step 3: Cross multiply
    3,712.28x = 5,122.85 × 2,219.45
  4. Step 4: Simplify right side
    3,712.28x = 11,369,872.72
  5. Step 5: Solve for x
    x = 11,369,872.72/3,712.28
  6. Step 6: Final answer
    x = 3,062.78

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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.