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Finding the Fourth Proportional to 2,221.92, 3,066.12 and 1,371

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Solution

The fourth proportional to 2,221.92, 3,066.12 and 1,371 is: 1,891.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.92 : 3,066.12 = 1,371 : x
  2. Step 2: Convert to fraction form
    2,221.92/3,066.12 = 1,371/x
  3. Step 3: Cross multiply
    2,221.92x = 3,066.12 × 1,371
  4. Step 4: Simplify right side
    2,221.92x = 4,203,650.52
  5. Step 5: Solve for x
    x = 4,203,650.52/2,221.92
  6. Step 6: Final answer
    x = 1,891.90

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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.