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Finding the Fourth Proportional to 319.61, 441.15 and 254.41

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Solution

The fourth proportional to 319.61, 441.15 and 254.41 is: 351.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.61 : 441.15 = 254.41 : x
  2. Step 2: Convert to fraction form
    319.61/441.15 = 254.41/x
  3. Step 3: Cross multiply
    319.61x = 441.15 × 254.41
  4. Step 4: Simplify right side
    319.61x = 112,230.91
  5. Step 5: Solve for x
    x = 112,230.91/319.61
  6. Step 6: Final answer
    x = 351.15

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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.