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Finding the Fourth Proportional to 324.78, 448.02 and 193.78

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Solution

The fourth proportional to 324.78, 448.02 and 193.78 is: 267.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.78 : 448.02 = 193.78 : x
  2. Step 2: Convert to fraction form
    324.78/448.02 = 193.78/x
  3. Step 3: Cross multiply
    324.78x = 448.02 × 193.78
  4. Step 4: Simplify right side
    324.78x = 86,817.32
  5. Step 5: Solve for x
    x = 86,817.32/324.78
  6. Step 6: Final answer
    x = 267.31

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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.