Home / 1,279.38-1,917.90-548.54

Finding the Fourth Proportional to 1,279.38, 1,917.90 and 548.54

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Solution

The fourth proportional to 1,279.38, 1,917.90 and 548.54 is: 822.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.38 : 1,917.90 = 548.54 : x
  2. Step 2: Convert to fraction form
    1,279.38/1,917.90 = 548.54/x
  3. Step 3: Cross multiply
    1,279.38x = 1,917.90 × 548.54
  4. Step 4: Simplify right side
    1,279.38x = 1,052,044.87
  5. Step 5: Solve for x
    x = 1,052,044.87/1,279.38
  6. Step 6: Final answer
    x = 822.31

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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.