Home / 2,132.21-3,198.11-1,299.05

Finding the Fourth Proportional to 2,132.21, 3,198.11 and 1,299.05

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Solution

The fourth proportional to 2,132.21, 3,198.11 and 1,299.05 is: 1,948.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.21 : 3,198.11 = 1,299.05 : x
  2. Step 2: Convert to fraction form
    2,132.21/3,198.11 = 1,299.05/x
  3. Step 3: Cross multiply
    2,132.21x = 3,198.11 × 1,299.05
  4. Step 4: Simplify right side
    2,132.21x = 4,154,482.31
  5. Step 5: Solve for x
    x = 4,154,482.31/2,132.21
  6. Step 6: Final answer
    x = 1,948.44

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Double scale
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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.