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Finding the Fourth Proportional to 448.25, 672.65 and 191.75

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Solution

The fourth proportional to 448.25, 672.65 and 191.75 is: 287.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.25 : 672.65 = 191.75 : x
  2. Step 2: Convert to fraction form
    448.25/672.65 = 191.75/x
  3. Step 3: Cross multiply
    448.25x = 672.65 × 191.75
  4. Step 4: Simplify right side
    448.25x = 128,979.68
  5. Step 5: Solve for x
    x = 128,979.68/448.25
  6. Step 6: Final answer
    x = 287.74

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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.