Home / 2,211.90-3,052.45-1,217.22

Finding the Fourth Proportional to 2,211.90, 3,052.45 and 1,217.22

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Solution

The fourth proportional to 2,211.90, 3,052.45 and 1,217.22 is: 1,679.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.90 : 3,052.45 = 1,217.22 : x
  2. Step 2: Convert to fraction form
    2,211.90/3,052.45 = 1,217.22/x
  3. Step 3: Cross multiply
    2,211.90x = 3,052.45 × 1,217.22
  4. Step 4: Simplify right side
    2,211.90x = 3,715,503.19
  5. Step 5: Solve for x
    x = 3,715,503.19/2,211.90
  6. Step 6: Final answer
    x = 1,679.78

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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.