Home / 2,140.28-3,210.84-679.04

Finding the Fourth Proportional to 2,140.28, 3,210.84 and 679.04

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Solution

The fourth proportional to 2,140.28, 3,210.84 and 679.04 is: 1,018.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.28 : 3,210.84 = 679.04 : x
  2. Step 2: Convert to fraction form
    2,140.28/3,210.84 = 679.04/x
  3. Step 3: Cross multiply
    2,140.28x = 3,210.84 × 679.04
  4. Step 4: Simplify right side
    2,140.28x = 2,180,288.79
  5. Step 5: Solve for x
    x = 2,180,288.79/2,140.28
  6. Step 6: Final answer
    x = 1,018.69

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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.