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Finding the Fourth Proportional to 750.92, 1,121.45 and 674.38

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Solution

The fourth proportional to 750.92, 1,121.45 and 674.38 is: 1,007.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.92 : 1,121.45 = 674.38 : x
  2. Step 2: Convert to fraction form
    750.92/1,121.45 = 674.38/x
  3. Step 3: Cross multiply
    750.92x = 1,121.45 × 674.38
  4. Step 4: Simplify right side
    750.92x = 756,277.84
  5. Step 5: Solve for x
    x = 756,277.84/750.92
  6. Step 6: Final answer
    x = 1,007.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.