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Finding the Fourth Proportional to 2,614.84, 3,921.97 and 765.97

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Solution

The fourth proportional to 2,614.84, 3,921.97 and 765.97 is: 1,148.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,614.84 : 3,921.97 = 765.97 : x
  2. Step 2: Convert to fraction form
    2,614.84/3,921.97 = 765.97/x
  3. Step 3: Cross multiply
    2,614.84x = 3,921.97 × 765.97
  4. Step 4: Simplify right side
    2,614.84x = 3,004,111.36
  5. Step 5: Solve for x
    x = 3,004,111.36/2,614.84
  6. Step 6: Final answer
    x = 1,148.87

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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.