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Finding the Fourth Proportional to 2,339, 3,227.89 and 1,291.13

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Solution

The fourth proportional to 2,339, 3,227.89 and 1,291.13 is: 1,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,339 : 3,227.89 = 1,291.13 : x
  2. Step 2: Convert to fraction form
    2,339/3,227.89 = 1,291.13/x
  3. Step 3: Cross multiply
    2,339x = 3,227.89 × 1,291.13
  4. Step 4: Simplify right side
    2,339x = 4,167,625.62
  5. Step 5: Solve for x
    x = 4,167,625.62/2,339
  6. Step 6: Final answer
    x = 1,781.80

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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.