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Finding the Fourth Proportional to 881.55, 1,322.39 and 394.65

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Solution

The fourth proportional to 881.55, 1,322.39 and 394.65 is: 592.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.55 : 1,322.39 = 394.65 : x
  2. Step 2: Convert to fraction form
    881.55/1,322.39 = 394.65/x
  3. Step 3: Cross multiply
    881.55x = 1,322.39 × 394.65
  4. Step 4: Simplify right side
    881.55x = 521,882.20
  5. Step 5: Solve for x
    x = 521,882.20/881.55
  6. Step 6: Final answer
    x = 592.01

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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.