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Finding the Fourth Proportional to 2,279.67, 3,418.55 and 719.26

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Solution

The fourth proportional to 2,279.67, 3,418.55 and 719.26 is: 1,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.67 : 3,418.55 = 719.26 : x
  2. Step 2: Convert to fraction form
    2,279.67/3,418.55 = 719.26/x
  3. Step 3: Cross multiply
    2,279.67x = 3,418.55 × 719.26
  4. Step 4: Simplify right side
    2,279.67x = 2,458,805.58
  5. Step 5: Solve for x
    x = 2,458,805.58/2,279.67
  6. Step 6: Final answer
    x = 1,078.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.