Home / 2,181.40-3,272.26-720.70

Finding the Fourth Proportional to 2,181.40, 3,272.26 and 720.70

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Solution

The fourth proportional to 2,181.40, 3,272.26 and 720.70 is: 1,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.40 : 3,272.26 = 720.70 : x
  2. Step 2: Convert to fraction form
    2,181.40/3,272.26 = 720.70/x
  3. Step 3: Cross multiply
    2,181.40x = 3,272.26 × 720.70
  4. Step 4: Simplify right side
    2,181.40x = 2,358,317.78
  5. Step 5: Solve for x
    x = 2,358,317.78/2,181.40
  6. Step 6: Final answer
    x = 1,081.10

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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.