Home / 3,619.76-5,430.36-1,279.66

Finding the Fourth Proportional to 3,619.76, 5,430.36 and 1,279.66

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Solution

The fourth proportional to 3,619.76, 5,430.36 and 1,279.66 is: 1,919.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.76 : 5,430.36 = 1,279.66 : x
  2. Step 2: Convert to fraction form
    3,619.76/5,430.36 = 1,279.66/x
  3. Step 3: Cross multiply
    3,619.76x = 5,430.36 × 1,279.66
  4. Step 4: Simplify right side
    3,619.76x = 6,949,014.48
  5. Step 5: Solve for x
    x = 6,949,014.48/3,619.76
  6. Step 6: Final answer
    x = 1,919.74

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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.