Home / 3,143.40-4,715.91-2,220.78

Finding the Fourth Proportional to 3,143.40, 4,715.91 and 2,220.78

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Solution

The fourth proportional to 3,143.40, 4,715.91 and 2,220.78 is: 3,331.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.40 : 4,715.91 = 2,220.78 : x
  2. Step 2: Convert to fraction form
    3,143.40/4,715.91 = 2,220.78/x
  3. Step 3: Cross multiply
    3,143.40x = 4,715.91 × 2,220.78
  4. Step 4: Simplify right side
    3,143.40x = 10,472,998.61
  5. Step 5: Solve for x
    x = 10,472,998.61/3,143.40
  6. Step 6: Final answer
    x = 3,331.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.