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Finding the Fourth Proportional to 448.28, 672.20 and 204.65

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Solution

The fourth proportional to 448.28, 672.20 and 204.65 is: 306.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.28 : 672.20 = 204.65 : x
  2. Step 2: Convert to fraction form
    448.28/672.20 = 204.65/x
  3. Step 3: Cross multiply
    448.28x = 672.20 × 204.65
  4. Step 4: Simplify right side
    448.28x = 137,565.73
  5. Step 5: Solve for x
    x = 137,565.73/448.28
  6. Step 6: Final answer
    x = 306.87

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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.