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Finding the Fourth Proportional to 2,216.72, 3,324.28 and 810.76

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Solution

The fourth proportional to 2,216.72, 3,324.28 and 810.76 is: 1,215.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.72 : 3,324.28 = 810.76 : x
  2. Step 2: Convert to fraction form
    2,216.72/3,324.28 = 810.76/x
  3. Step 3: Cross multiply
    2,216.72x = 3,324.28 × 810.76
  4. Step 4: Simplify right side
    2,216.72x = 2,695,193.25
  5. Step 5: Solve for x
    x = 2,695,193.25/2,216.72
  6. Step 6: Final answer
    x = 1,215.85

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1.5x scale

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.