Home / 3,439.40-4,748.10-2,877.80

Finding the Fourth Proportional to 3,439.40, 4,748.10 and 2,877.80

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Solution

The fourth proportional to 3,439.40, 4,748.10 and 2,877.80 is: 3,972.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.40 : 4,748.10 = 2,877.80 : x
  2. Step 2: Convert to fraction form
    3,439.40/4,748.10 = 2,877.80/x
  3. Step 3: Cross multiply
    3,439.40x = 4,748.10 × 2,877.80
  4. Step 4: Simplify right side
    3,439.40x = 13,664,082.18
  5. Step 5: Solve for x
    x = 13,664,082.18/3,439.40
  6. Step 6: Final answer
    x = 3,972.81

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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.