Home / 3,988.20-5,503.77-2,219.85

Finding the Fourth Proportional to 3,988.20, 5,503.77 and 2,219.85

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Solution

The fourth proportional to 3,988.20, 5,503.77 and 2,219.85 is: 3,063.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.20 : 5,503.77 = 2,219.85 : x
  2. Step 2: Convert to fraction form
    3,988.20/5,503.77 = 2,219.85/x
  3. Step 3: Cross multiply
    3,988.20x = 5,503.77 × 2,219.85
  4. Step 4: Simplify right side
    3,988.20x = 12,217,543.83
  5. Step 5: Solve for x
    x = 12,217,543.83/3,988.20
  6. Step 6: Final answer
    x = 3,063.42

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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.