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Finding the Fourth Proportional to 2,808.97, 4,213.40 and 1,248.55

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Solution

The fourth proportional to 2,808.97, 4,213.40 and 1,248.55 is: 1,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.97 : 4,213.40 = 1,248.55 : x
  2. Step 2: Convert to fraction form
    2,808.97/4,213.40 = 1,248.55/x
  3. Step 3: Cross multiply
    2,808.97x = 4,213.40 × 1,248.55
  4. Step 4: Simplify right side
    2,808.97x = 5,260,640.57
  5. Step 5: Solve for x
    x = 5,260,640.57/2,808.97
  6. Step 6: Final answer
    x = 1,872.80

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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.