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Finding the Fourth Proportional to 322.72, 484.74 and 213.19

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Solution

The fourth proportional to 322.72, 484.74 and 213.19 is: 320.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.72 : 484.74 = 213.19 : x
  2. Step 2: Convert to fraction form
    322.72/484.74 = 213.19/x
  3. Step 3: Cross multiply
    322.72x = 484.74 × 213.19
  4. Step 4: Simplify right side
    322.72x = 103,341.72
  5. Step 5: Solve for x
    x = 103,341.72/322.72
  6. Step 6: Final answer
    x = 320.22

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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.