Home / 3,988.30-5,504.10-2,219.90

Finding the Fourth Proportional to 3,988.30, 5,504.10 and 2,219.90

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Solution

The fourth proportional to 3,988.30, 5,504.10 and 2,219.90 is: 3,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.30 : 5,504.10 = 2,219.90 : x
  2. Step 2: Convert to fraction form
    3,988.30/5,504.10 = 2,219.90/x
  3. Step 3: Cross multiply
    3,988.30x = 5,504.10 × 2,219.90
  4. Step 4: Simplify right side
    3,988.30x = 12,218,551.59
  5. Step 5: Solve for x
    x = 12,218,551.59/3,988.30
  6. Step 6: Final answer
    x = 3,063.60

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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.