Home / 2,137.24-3,207.12-839.80

Finding the Fourth Proportional to 2,137.24, 3,207.12 and 839.80

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Solution

The fourth proportional to 2,137.24, 3,207.12 and 839.80 is: 1,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.24 : 3,207.12 = 839.80 : x
  2. Step 2: Convert to fraction form
    2,137.24/3,207.12 = 839.80/x
  3. Step 3: Cross multiply
    2,137.24x = 3,207.12 × 839.80
  4. Step 4: Simplify right side
    2,137.24x = 2,693,339.38
  5. Step 5: Solve for x
    x = 2,693,339.38/2,137.24
  6. Step 6: Final answer
    x = 1,260.20

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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.