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Finding the Fourth Proportional to 1,959.65, 2,938.09 and 726.76

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Solution

The fourth proportional to 1,959.65, 2,938.09 and 726.76 is: 1,089.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.65 : 2,938.09 = 726.76 : x
  2. Step 2: Convert to fraction form
    1,959.65/2,938.09 = 726.76/x
  3. Step 3: Cross multiply
    1,959.65x = 2,938.09 × 726.76
  4. Step 4: Simplify right side
    1,959.65x = 2,135,286.29
  5. Step 5: Solve for x
    x = 2,135,286.29/1,959.65
  6. Step 6: Final answer
    x = 1,089.63

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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.