Home / 1,279.64-1,919.61-548.79

Finding the Fourth Proportional to 1,279.64, 1,919.61 and 548.79

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Solution

The fourth proportional to 1,279.64, 1,919.61 and 548.79 is: 823.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.64 : 1,919.61 = 548.79 : x
  2. Step 2: Convert to fraction form
    1,279.64/1,919.61 = 548.79/x
  3. Step 3: Cross multiply
    1,279.64x = 1,919.61 × 548.79
  4. Step 4: Simplify right side
    1,279.64x = 1,053,462.77
  5. Step 5: Solve for x
    x = 1,053,462.77/1,279.64
  6. Step 6: Final answer
    x = 823.25

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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.