Home / 3,612.80-5,408.40-2,151.20

Finding the Fourth Proportional to 3,612.80, 5,408.40 and 2,151.20

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Solution

The fourth proportional to 3,612.80, 5,408.40 and 2,151.20 is: 3,220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.80 : 5,408.40 = 2,151.20 : x
  2. Step 2: Convert to fraction form
    3,612.80/5,408.40 = 2,151.20/x
  3. Step 3: Cross multiply
    3,612.80x = 5,408.40 × 2,151.20
  4. Step 4: Simplify right side
    3,612.80x = 11,634,550.08
  5. Step 5: Solve for x
    x = 11,634,550.08/3,612.80
  6. Step 6: Final answer
    x = 3,220.37

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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.