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Finding the Fourth Proportional to 322.81, 484.22 and 103.43

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Solution

The fourth proportional to 322.81, 484.22 and 103.43 is: 155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.81 : 484.22 = 103.43 : x
  2. Step 2: Convert to fraction form
    322.81/484.22 = 103.43/x
  3. Step 3: Cross multiply
    322.81x = 484.22 × 103.43
  4. Step 4: Simplify right side
    322.81x = 50,082.87
  5. Step 5: Solve for x
    x = 50,082.87/322.81
  6. Step 6: Final answer
    x = 155.15

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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.