Home / 2,180.40-3,271.23-719.70

Finding the Fourth Proportional to 2,180.40, 3,271.23 and 719.70

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Solution

The fourth proportional to 2,180.40, 3,271.23 and 719.70 is: 1,079.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180.40 : 3,271.23 = 719.70 : x
  2. Step 2: Convert to fraction form
    2,180.40/3,271.23 = 719.70/x
  3. Step 3: Cross multiply
    2,180.40x = 3,271.23 × 719.70
  4. Step 4: Simplify right side
    2,180.40x = 2,354,304.23
  5. Step 5: Solve for x
    x = 2,354,304.23/2,180.40
  6. Step 6: Final answer
    x = 1,079.76

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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.