Home / 1,279.33-1,919.53-539.12

Finding the Fourth Proportional to 1,279.33, 1,919.53 and 539.12

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Solution

The fourth proportional to 1,279.33, 1,919.53 and 539.12 is: 808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.33 : 1,919.53 = 539.12 : x
  2. Step 2: Convert to fraction form
    1,279.33/1,919.53 = 539.12/x
  3. Step 3: Cross multiply
    1,279.33x = 1,919.53 × 539.12
  4. Step 4: Simplify right side
    1,279.33x = 1,034,862.49
  5. Step 5: Solve for x
    x = 1,034,862.49/1,279.33
  6. Step 6: Final answer
    x = 808.91

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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.