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Finding the Fourth Proportional to 322.53, 484.34 and 211.53

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Solution

The fourth proportional to 322.53, 484.34 and 211.53 is: 317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.53 : 484.34 = 211.53 : x
  2. Step 2: Convert to fraction form
    322.53/484.34 = 211.53/x
  3. Step 3: Cross multiply
    322.53x = 484.34 × 211.53
  4. Step 4: Simplify right side
    322.53x = 102,451.38
  5. Step 5: Solve for x
    x = 102,451.38/322.53
  6. Step 6: Final answer
    x = 317.65

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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.