Home / 1,279.26-1,919.16-630.72

Finding the Fourth Proportional to 1,279.26, 1,919.16 and 630.72

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Solution

The fourth proportional to 1,279.26, 1,919.16 and 630.72 is: 946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.26 : 1,919.16 = 630.72 : x
  2. Step 2: Convert to fraction form
    1,279.26/1,919.16 = 630.72/x
  3. Step 3: Cross multiply
    1,279.26x = 1,919.16 × 630.72
  4. Step 4: Simplify right side
    1,279.26x = 1,210,452.60
  5. Step 5: Solve for x
    x = 1,210,452.60/1,279.26
  6. Step 6: Final answer
    x = 946.21

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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.