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Finding the Fourth Proportional to 319.09, 439.95 and 272.38

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Solution

The fourth proportional to 319.09, 439.95 and 272.38 is: 375.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.09 : 439.95 = 272.38 : x
  2. Step 2: Convert to fraction form
    319.09/439.95 = 272.38/x
  3. Step 3: Cross multiply
    319.09x = 439.95 × 272.38
  4. Step 4: Simplify right side
    319.09x = 119,833.58
  5. Step 5: Solve for x
    x = 119,833.58/319.09
  6. Step 6: Final answer
    x = 375.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.