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Finding the Fourth Proportional to 1,246.68, 1,721.11 and 749.44

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Solution

The fourth proportional to 1,246.68, 1,721.11 and 749.44 is: 1,034.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.68 : 1,721.11 = 749.44 : x
  2. Step 2: Convert to fraction form
    1,246.68/1,721.11 = 749.44/x
  3. Step 3: Cross multiply
    1,246.68x = 1,721.11 × 749.44
  4. Step 4: Simplify right side
    1,246.68x = 1,289,868.68
  5. Step 5: Solve for x
    x = 1,289,868.68/1,246.68
  6. Step 6: Final answer
    x = 1,034.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.