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Finding the Fourth Proportional to 448.74, 672.39 and 326.79

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Solution

The fourth proportional to 448.74, 672.39 and 326.79 is: 489.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.74 : 672.39 = 326.79 : x
  2. Step 2: Convert to fraction form
    448.74/672.39 = 326.79/x
  3. Step 3: Cross multiply
    448.74x = 672.39 × 326.79
  4. Step 4: Simplify right side
    448.74x = 219,730.33
  5. Step 5: Solve for x
    x = 219,730.33/448.74
  6. Step 6: Final answer
    x = 489.66

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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.