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Finding the Fourth Proportional to 3,965.90, 5,472.90 and 2,197.49

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Solution

The fourth proportional to 3,965.90, 5,472.90 and 2,197.49 is: 3,032.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.90 : 5,472.90 = 2,197.49 : x
  2. Step 2: Convert to fraction form
    3,965.90/5,472.90 = 2,197.49/x
  3. Step 3: Cross multiply
    3,965.90x = 5,472.90 × 2,197.49
  4. Step 4: Simplify right side
    3,965.90x = 12,026,615.66
  5. Step 5: Solve for x
    x = 12,026,615.66/3,965.90
  6. Step 6: Final answer
    x = 3,032.51

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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.