Home / 2,146.20-3,214.50-1,321.80

Finding the Fourth Proportional to 2,146.20, 3,214.50 and 1,321.80

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Solution

The fourth proportional to 2,146.20, 3,214.50 and 1,321.80 is: 1,979.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.20 : 3,214.50 = 1,321.80 : x
  2. Step 2: Convert to fraction form
    2,146.20/3,214.50 = 1,321.80/x
  3. Step 3: Cross multiply
    2,146.20x = 3,214.50 × 1,321.80
  4. Step 4: Simplify right side
    2,146.20x = 4,248,926.10
  5. Step 5: Solve for x
    x = 4,248,926.10/2,146.20
  6. Step 6: Final answer
    x = 1,979.74

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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.