Home / 2,309.40-3,186-1,680.30

Finding the Fourth Proportional to 2,309.40, 3,186 and 1,680.30

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Solution

The fourth proportional to 2,309.40, 3,186 and 1,680.30 is: 2,318.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.40 : 3,186 = 1,680.30 : x
  2. Step 2: Convert to fraction form
    2,309.40/3,186 = 1,680.30/x
  3. Step 3: Cross multiply
    2,309.40x = 3,186 × 1,680.30
  4. Step 4: Simplify right side
    2,309.40x = 5,353,435.80
  5. Step 5: Solve for x
    x = 5,353,435.80/2,309.40
  6. Step 6: Final answer
    x = 2,318.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.