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Finding the Fourth Proportional to 881.04, 1,321.14 and 394.22

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Solution

The fourth proportional to 881.04, 1,321.14 and 394.22 is: 591.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.04 : 1,321.14 = 394.22 : x
  2. Step 2: Convert to fraction form
    881.04/1,321.14 = 394.22/x
  3. Step 3: Cross multiply
    881.04x = 1,321.14 × 394.22
  4. Step 4: Simplify right side
    881.04x = 520,819.81
  5. Step 5: Solve for x
    x = 520,819.81/881.04
  6. Step 6: Final answer
    x = 591.14

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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.