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Finding the Fourth Proportional to 2,497.30, 3,744.69 and 765.70

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Solution

The fourth proportional to 2,497.30, 3,744.69 and 765.70 is: 1,148.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,497.30 : 3,744.69 = 765.70 : x
  2. Step 2: Convert to fraction form
    2,497.30/3,744.69 = 765.70/x
  3. Step 3: Cross multiply
    2,497.30x = 3,744.69 × 765.70
  4. Step 4: Simplify right side
    2,497.30x = 2,867,309.13
  5. Step 5: Solve for x
    x = 2,867,309.13/2,497.30
  6. Step 6: Final answer
    x = 1,148.16

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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.