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Finding the Fourth Proportional to 2,651.20, 3,976.80 and 2,550.40

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Solution

The fourth proportional to 2,651.20, 3,976.80 and 2,550.40 is: 3,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,651.20 : 3,976.80 = 2,550.40 : x
  2. Step 2: Convert to fraction form
    2,651.20/3,976.80 = 2,550.40/x
  3. Step 3: Cross multiply
    2,651.20x = 3,976.80 × 2,550.40
  4. Step 4: Simplify right side
    2,651.20x = 10,142,430.72
  5. Step 5: Solve for x
    x = 10,142,430.72/2,651.20
  6. Step 6: Final answer
    x = 3,825.60

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Similar ratio
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1.5x scale

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.