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Finding the Fourth Proportional to 2,408.47, 3,612.67 and 764.71

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Solution

The fourth proportional to 2,408.47, 3,612.67 and 764.71 is: 1,147.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,408.47 : 3,612.67 = 764.71 : x
  2. Step 2: Convert to fraction form
    2,408.47/3,612.67 = 764.71/x
  3. Step 3: Cross multiply
    2,408.47x = 3,612.67 × 764.71
  4. Step 4: Simplify right side
    2,408.47x = 2,762,633.93
  5. Step 5: Solve for x
    x = 2,762,633.93/2,408.47
  6. Step 6: Final answer
    x = 1,147.05

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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.