Home / 2,221.56-3,330.72-1,917

Finding the Fourth Proportional to 2,221.56, 3,330.72 and 1,917

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Solution

The fourth proportional to 2,221.56, 3,330.72 and 1,917 is: 2,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.56 : 3,330.72 = 1,917 : x
  2. Step 2: Convert to fraction form
    2,221.56/3,330.72 = 1,917/x
  3. Step 3: Cross multiply
    2,221.56x = 3,330.72 × 1,917
  4. Step 4: Simplify right side
    2,221.56x = 6,384,990.24
  5. Step 5: Solve for x
    x = 6,384,990.24/2,221.56
  6. Step 6: Final answer
    x = 2,874.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.