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Finding the Fourth Proportional to 2,215, 3,322.92 and 829.32

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Solution

The fourth proportional to 2,215, 3,322.92 and 829.32 is: 1,244.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215 : 3,322.92 = 829.32 : x
  2. Step 2: Convert to fraction form
    2,215/3,322.92 = 829.32/x
  3. Step 3: Cross multiply
    2,215x = 3,322.92 × 829.32
  4. Step 4: Simplify right side
    2,215x = 2,755,764.01
  5. Step 5: Solve for x
    x = 2,755,764.01/2,215
  6. Step 6: Final answer
    x = 1,244.14

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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.