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Finding the Fourth Proportional to 881.36, 1,322.12 and 326.21

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Solution

The fourth proportional to 881.36, 1,322.12 and 326.21 is: 489.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.36 : 1,322.12 = 326.21 : x
  2. Step 2: Convert to fraction form
    881.36/1,322.12 = 326.21/x
  3. Step 3: Cross multiply
    881.36x = 1,322.12 × 326.21
  4. Step 4: Simplify right side
    881.36x = 431,287.93
  5. Step 5: Solve for x
    x = 431,287.93/881.36
  6. Step 6: Final answer
    x = 489.35

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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.