Home / 2,140.11-3,210.52-679.61

Finding the Fourth Proportional to 2,140.11, 3,210.52 and 679.61

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Solution

The fourth proportional to 2,140.11, 3,210.52 and 679.61 is: 1,019.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.11 : 3,210.52 = 679.61 : x
  2. Step 2: Convert to fraction form
    2,140.11/3,210.52 = 679.61/x
  3. Step 3: Cross multiply
    2,140.11x = 3,210.52 × 679.61
  4. Step 4: Simplify right side
    2,140.11x = 2,181,901.50
  5. Step 5: Solve for x
    x = 2,181,901.50/2,140.11
  6. Step 6: Final answer
    x = 1,019.53

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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.