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Finding the Fourth Proportional to 1,997.92, 2,757.14 and 1,113.64

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Solution

The fourth proportional to 1,997.92, 2,757.14 and 1,113.64 is: 1,536.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.92 : 2,757.14 = 1,113.64 : x
  2. Step 2: Convert to fraction form
    1,997.92/2,757.14 = 1,113.64/x
  3. Step 3: Cross multiply
    1,997.92x = 2,757.14 × 1,113.64
  4. Step 4: Simplify right side
    1,997.92x = 3,070,461.39
  5. Step 5: Solve for x
    x = 3,070,461.39/1,997.92
  6. Step 6: Final answer
    x = 1,536.83

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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.