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Finding the Fourth Proportional to 319.29, 440.49 and 236.59

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Solution

The fourth proportional to 319.29, 440.49 and 236.59 is: 326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.29 : 440.49 = 236.59 : x
  2. Step 2: Convert to fraction form
    319.29/440.49 = 236.59/x
  3. Step 3: Cross multiply
    319.29x = 440.49 × 236.59
  4. Step 4: Simplify right side
    319.29x = 104,215.53
  5. Step 5: Solve for x
    x = 104,215.53/319.29
  6. Step 6: Final answer
    x = 326.40

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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.