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Finding the Fourth Proportional to 319.17, 440.45 and 179.30

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Solution

The fourth proportional to 319.17, 440.45 and 179.30 is: 247.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.17 : 440.45 = 179.30 : x
  2. Step 2: Convert to fraction form
    319.17/440.45 = 179.30/x
  3. Step 3: Cross multiply
    319.17x = 440.45 × 179.30
  4. Step 4: Simplify right side
    319.17x = 78,969.59
  5. Step 5: Solve for x
    x = 78,969.59/319.17
  6. Step 6: Final answer
    x = 247.42

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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.