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Finding the Fourth Proportional to 322.85, 484.44 and 140.23

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Solution

The fourth proportional to 322.85, 484.44 and 140.23 is: 210.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.85 : 484.44 = 140.23 : x
  2. Step 2: Convert to fraction form
    322.85/484.44 = 140.23/x
  3. Step 3: Cross multiply
    322.85x = 484.44 × 140.23
  4. Step 4: Simplify right side
    322.85x = 67,933.02
  5. Step 5: Solve for x
    x = 67,933.02/322.85
  6. Step 6: Final answer
    x = 210.42

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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.