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Finding the Fourth Proportional to 3,073.70, 4,610.52 and 765.20

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Solution

The fourth proportional to 3,073.70, 4,610.52 and 765.20 is: 1,147.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,073.70 : 4,610.52 = 765.20 : x
  2. Step 2: Convert to fraction form
    3,073.70/4,610.52 = 765.20/x
  3. Step 3: Cross multiply
    3,073.70x = 4,610.52 × 765.20
  4. Step 4: Simplify right side
    3,073.70x = 3,527,969.90
  5. Step 5: Solve for x
    x = 3,527,969.90/3,073.70
  6. Step 6: Final answer
    x = 1,147.79

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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.