Home / 2,181.49-3,272.19-720.73

Finding the Fourth Proportional to 2,181.49, 3,272.19 and 720.73

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Solution

The fourth proportional to 2,181.49, 3,272.19 and 720.73 is: 1,081.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.49 : 3,272.19 = 720.73 : x
  2. Step 2: Convert to fraction form
    2,181.49/3,272.19 = 720.73/x
  3. Step 3: Cross multiply
    2,181.49x = 3,272.19 × 720.73
  4. Step 4: Simplify right side
    2,181.49x = 2,358,365.50
  5. Step 5: Solve for x
    x = 2,358,365.50/2,181.49
  6. Step 6: Final answer
    x = 1,081.08

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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.