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Finding the Fourth Proportional to 2,408.65, 3,613.52 and 765.29

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Solution

The fourth proportional to 2,408.65, 3,613.52 and 765.29 is: 1,148.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,408.65 : 3,613.52 = 765.29 : x
  2. Step 2: Convert to fraction form
    2,408.65/3,613.52 = 765.29/x
  3. Step 3: Cross multiply
    2,408.65x = 3,613.52 × 765.29
  4. Step 4: Simplify right side
    2,408.65x = 2,765,401.67
  5. Step 5: Solve for x
    x = 2,765,401.67/2,408.65
  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.