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Finding the Fourth Proportional to 1,144.41, 1,578.09 and 979.17

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Solution

The fourth proportional to 1,144.41, 1,578.09 and 979.17 is: 1,350.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.41 : 1,578.09 = 979.17 : x
  2. Step 2: Convert to fraction form
    1,144.41/1,578.09 = 979.17/x
  3. Step 3: Cross multiply
    1,144.41x = 1,578.09 × 979.17
  4. Step 4: Simplify right side
    1,144.41x = 1,545,218.39
  5. Step 5: Solve for x
    x = 1,545,218.39/1,144.41
  6. Step 6: Final answer
    x = 1,350.23

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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.