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Finding the Fourth Proportional to 448.75, 672.64 and 188.69

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Solution

The fourth proportional to 448.75, 672.64 and 188.69 is: 282.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.75 : 672.64 = 188.69 : x
  2. Step 2: Convert to fraction form
    448.75/672.64 = 188.69/x
  3. Step 3: Cross multiply
    448.75x = 672.64 × 188.69
  4. Step 4: Simplify right side
    448.75x = 126,920.44
  5. Step 5: Solve for x
    x = 126,920.44/448.75
  6. Step 6: Final answer
    x = 282.83

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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.