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Finding the Fourth Proportional to 322.85, 484.13 and 103.42

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Solution

The fourth proportional to 322.85, 484.13 and 103.42 is: 155.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.85 : 484.13 = 103.42 : x
  2. Step 2: Convert to fraction form
    322.85/484.13 = 103.42/x
  3. Step 3: Cross multiply
    322.85x = 484.13 × 103.42
  4. Step 4: Simplify right side
    322.85x = 50,066.30
  5. Step 5: Solve for x
    x = 50,066.30/322.85
  6. Step 6: Final answer
    x = 155.08

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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.