Home / 2,217.72-3,325.79-811.76

Finding the Fourth Proportional to 2,217.72, 3,325.79 and 811.76

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Solution

The fourth proportional to 2,217.72, 3,325.79 and 811.76 is: 1,217.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.72 : 3,325.79 = 811.76 : x
  2. Step 2: Convert to fraction form
    2,217.72/3,325.79 = 811.76/x
  3. Step 3: Cross multiply
    2,217.72x = 3,325.79 × 811.76
  4. Step 4: Simplify right side
    2,217.72x = 2,699,722.60
  5. Step 5: Solve for x
    x = 2,699,722.60/2,217.72
  6. Step 6: Final answer
    x = 1,217.34

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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.