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Finding the Fourth Proportional to 324.93, 448.22 and 221.25

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Solution

The fourth proportional to 324.93, 448.22 and 221.25 is: 305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.93 : 448.22 = 221.25 : x
  2. Step 2: Convert to fraction form
    324.93/448.22 = 221.25/x
  3. Step 3: Cross multiply
    324.93x = 448.22 × 221.25
  4. Step 4: Simplify right side
    324.93x = 99,167.57
  5. Step 5: Solve for x
    x = 99,167.57/324.93
  6. Step 6: Final answer
    x = 305.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.