Home / 1,279.44-1,919.45-586.21

Finding the Fourth Proportional to 1,279.44, 1,919.45 and 586.21

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Solution

The fourth proportional to 1,279.44, 1,919.45 and 586.21 is: 879.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.44 : 1,919.45 = 586.21 : x
  2. Step 2: Convert to fraction form
    1,279.44/1,919.45 = 586.21/x
  3. Step 3: Cross multiply
    1,279.44x = 1,919.45 × 586.21
  4. Step 4: Simplify right side
    1,279.44x = 1,125,200.78
  5. Step 5: Solve for x
    x = 1,125,200.78/1,279.44
  6. Step 6: Final answer
    x = 879.45

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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.