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Finding the Fourth Proportional to 2,691.85, 3,712.53 and 1,897.82

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Solution

The fourth proportional to 2,691.85, 3,712.53 and 1,897.82 is: 2,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.85 : 3,712.53 = 1,897.82 : x
  2. Step 2: Convert to fraction form
    2,691.85/3,712.53 = 1,897.82/x
  3. Step 3: Cross multiply
    2,691.85x = 3,712.53 × 1,897.82
  4. Step 4: Simplify right side
    2,691.85x = 7,045,713.68
  5. Step 5: Solve for x
    x = 7,045,713.68/2,691.85
  6. Step 6: Final answer
    x = 2,617.42

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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.