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Finding the Fourth Proportional to 881.62, 1,322.07 and 394.90

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Solution

The fourth proportional to 881.62, 1,322.07 and 394.90 is: 592.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.62 : 1,322.07 = 394.90 : x
  2. Step 2: Convert to fraction form
    881.62/1,322.07 = 394.90/x
  3. Step 3: Cross multiply
    881.62x = 1,322.07 × 394.90
  4. Step 4: Simplify right side
    881.62x = 522,085.44
  5. Step 5: Solve for x
    x = 522,085.44/881.62
  6. Step 6: Final answer
    x = 592.19

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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.