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Finding the Fourth Proportional to 965.62, 1,448.36 and 272.39

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Solution

The fourth proportional to 965.62, 1,448.36 and 272.39 is: 408.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.62 : 1,448.36 = 272.39 : x
  2. Step 2: Convert to fraction form
    965.62/1,448.36 = 272.39/x
  3. Step 3: Cross multiply
    965.62x = 1,448.36 × 272.39
  4. Step 4: Simplify right side
    965.62x = 394,514.51
  5. Step 5: Solve for x
    x = 394,514.51/965.62
  6. Step 6: Final answer
    x = 408.56

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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.