Home / 2,214.91-3,321.20-981.79

Finding the Fourth Proportional to 2,214.91, 3,321.20 and 981.79

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Solution

The fourth proportional to 2,214.91, 3,321.20 and 981.79 is: 1,472.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,214.91 : 3,321.20 = 981.79 : x
  2. Step 2: Convert to fraction form
    2,214.91/3,321.20 = 981.79/x
  3. Step 3: Cross multiply
    2,214.91x = 3,321.20 × 981.79
  4. Step 4: Simplify right side
    2,214.91x = 3,260,715.10
  5. Step 5: Solve for x
    x = 3,260,715.10/2,214.91
  6. Step 6: Final answer
    x = 1,472.17

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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.