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Finding the Fourth Proportional to 1,997.42, 2,757.16 and 1,438.22

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Solution

The fourth proportional to 1,997.42, 2,757.16 and 1,438.22 is: 1,985.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.42 : 2,757.16 = 1,438.22 : x
  2. Step 2: Convert to fraction form
    1,997.42/2,757.16 = 1,438.22/x
  3. Step 3: Cross multiply
    1,997.42x = 2,757.16 × 1,438.22
  4. Step 4: Simplify right side
    1,997.42x = 3,965,402.66
  5. Step 5: Solve for x
    x = 3,965,402.66/1,997.42
  6. Step 6: Final answer
    x = 1,985.26

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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.