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Finding the Fourth Proportional to 448.19, 672.48 and 255.81

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Solution

The fourth proportional to 448.19, 672.48 and 255.81 is: 383.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.19 : 672.48 = 255.81 : x
  2. Step 2: Convert to fraction form
    448.19/672.48 = 255.81/x
  3. Step 3: Cross multiply
    448.19x = 672.48 × 255.81
  4. Step 4: Simplify right side
    448.19x = 172,027.11
  5. Step 5: Solve for x
    x = 172,027.11/448.19
  6. Step 6: Final answer
    x = 383.83

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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.