Home / 1,279.73-1,919.51-499.59

Finding the Fourth Proportional to 1,279.73, 1,919.51 and 499.59

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Solution

The fourth proportional to 1,279.73, 1,919.51 and 499.59 is: 749.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.73 : 1,919.51 = 499.59 : x
  2. Step 2: Convert to fraction form
    1,279.73/1,919.51 = 499.59/x
  3. Step 3: Cross multiply
    1,279.73x = 1,919.51 × 499.59
  4. Step 4: Simplify right side
    1,279.73x = 958,958.30
  5. Step 5: Solve for x
    x = 958,958.30/1,279.73
  6. Step 6: Final answer
    x = 749.34

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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.