Home / 2,455.20-3,679.60-1,138.80

Finding the Fourth Proportional to 2,455.20, 3,679.60 and 1,138.80

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Solution

The fourth proportional to 2,455.20, 3,679.60 and 1,138.80 is: 1,706.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.20 : 3,679.60 = 1,138.80 : x
  2. Step 2: Convert to fraction form
    2,455.20/3,679.60 = 1,138.80/x
  3. Step 3: Cross multiply
    2,455.20x = 3,679.60 × 1,138.80
  4. Step 4: Simplify right side
    2,455.20x = 4,190,328.48
  5. Step 5: Solve for x
    x = 4,190,328.48/2,455.20
  6. Step 6: Final answer
    x = 1,706.72

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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.