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Finding the Fourth Proportional to 448.78, 673.24 and 205.54

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Solution

The fourth proportional to 448.78, 673.24 and 205.54 is: 308.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.78 : 673.24 = 205.54 : x
  2. Step 2: Convert to fraction form
    448.78/673.24 = 205.54/x
  3. Step 3: Cross multiply
    448.78x = 673.24 × 205.54
  4. Step 4: Simplify right side
    448.78x = 138,377.75
  5. Step 5: Solve for x
    x = 138,377.75/448.78
  6. Step 6: Final answer
    x = 308.34

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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.