Home / 2,140.12-3,210.14-679.26

Finding the Fourth Proportional to 2,140.12, 3,210.14 and 679.26

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Solution

The fourth proportional to 2,140.12, 3,210.14 and 679.26 is: 1,018.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.12 : 3,210.14 = 679.26 : x
  2. Step 2: Convert to fraction form
    2,140.12/3,210.14 = 679.26/x
  3. Step 3: Cross multiply
    2,140.12x = 3,210.14 × 679.26
  4. Step 4: Simplify right side
    2,140.12x = 2,180,519.70
  5. Step 5: Solve for x
    x = 2,180,519.70/2,140.12
  6. Step 6: Final answer
    x = 1,018.88

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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.