Home / 2,081.40-3,121.10-620.04

Finding the Fourth Proportional to 2,081.40, 3,121.10 and 620.04

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Solution

The fourth proportional to 2,081.40, 3,121.10 and 620.04 is: 929.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.40 : 3,121.10 = 620.04 : x
  2. Step 2: Convert to fraction form
    2,081.40/3,121.10 = 620.04/x
  3. Step 3: Cross multiply
    2,081.40x = 3,121.10 × 620.04
  4. Step 4: Simplify right side
    2,081.40x = 1,935,206.84
  5. Step 5: Solve for x
    x = 1,935,206.84/2,081.40
  6. Step 6: Final answer
    x = 929.76

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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.