Home / 1,279.52-1,919.40-548.96

Finding the Fourth Proportional to 1,279.52, 1,919.40 and 548.96

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Solution

The fourth proportional to 1,279.52, 1,919.40 and 548.96 is: 823.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.52 : 1,919.40 = 548.96 : x
  2. Step 2: Convert to fraction form
    1,279.52/1,919.40 = 548.96/x
  3. Step 3: Cross multiply
    1,279.52x = 1,919.40 × 548.96
  4. Step 4: Simplify right side
    1,279.52x = 1,053,673.82
  5. Step 5: Solve for x
    x = 1,053,673.82/1,279.52
  6. Step 6: Final answer
    x = 823.49

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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.