Home / 3,988.30-5,503.71-2,219.86

Finding the Fourth Proportional to 3,988.30, 5,503.71 and 2,219.86

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Solution

The fourth proportional to 3,988.30, 5,503.71 and 2,219.86 is: 3,063.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.30 : 5,503.71 = 2,219.86 : x
  2. Step 2: Convert to fraction form
    3,988.30/5,503.71 = 2,219.86/x
  3. Step 3: Cross multiply
    3,988.30x = 5,503.71 × 2,219.86
  4. Step 4: Simplify right side
    3,988.30x = 12,217,465.68
  5. Step 5: Solve for x
    x = 12,217,465.68/3,988.30
  6. Step 6: Final answer
    x = 3,063.33

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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.