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Finding the Fourth Proportional to 2,408.86, 3,613.29 and 765.41

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Solution

The fourth proportional to 2,408.86, 3,613.29 and 765.41 is: 1,148.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,408.86 : 3,613.29 = 765.41 : x
  2. Step 2: Convert to fraction form
    2,408.86/3,613.29 = 765.41/x
  3. Step 3: Cross multiply
    2,408.86x = 3,613.29 × 765.41
  4. Step 4: Simplify right side
    2,408.86x = 2,765,639.52
  5. Step 5: Solve for x
    x = 2,765,639.52/2,408.86
  6. Step 6: Final answer
    x = 1,148.11

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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.