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Finding the Fourth Proportional to 1,318.33, 1,974.10 and 1,279.41

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Solution

The fourth proportional to 1,318.33, 1,974.10 and 1,279.41 is: 1,915.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.33 : 1,974.10 = 1,279.41 : x
  2. Step 2: Convert to fraction form
    1,318.33/1,974.10 = 1,279.41/x
  3. Step 3: Cross multiply
    1,318.33x = 1,974.10 × 1,279.41
  4. Step 4: Simplify right side
    1,318.33x = 2,525,676.88
  5. Step 5: Solve for x
    x = 2,525,676.88/1,318.33
  6. Step 6: Final answer
    x = 1,915.82

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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.