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Finding the Fourth Proportional to 3,143.70, 4,715.55 and 2,819.70

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Solution

The fourth proportional to 3,143.70, 4,715.55 and 2,819.70 is: 4,229.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.70 : 4,715.55 = 2,819.70 : x
  2. Step 2: Convert to fraction form
    3,143.70/4,715.55 = 2,819.70/x
  3. Step 3: Cross multiply
    3,143.70x = 4,715.55 × 2,819.70
  4. Step 4: Simplify right side
    3,143.70x = 13,296,436.34
  5. Step 5: Solve for x
    x = 13,296,436.34/3,143.70
  6. Step 6: Final answer
    x = 4,229.55

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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.