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Finding the Fourth Proportional to 319.36, 440.71 and 186.61

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Solution

The fourth proportional to 319.36, 440.71 and 186.61 is: 257.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.36 : 440.71 = 186.61 : x
  2. Step 2: Convert to fraction form
    319.36/440.71 = 186.61/x
  3. Step 3: Cross multiply
    319.36x = 440.71 × 186.61
  4. Step 4: Simplify right side
    319.36x = 82,237.76
  5. Step 5: Solve for x
    x = 82,237.76/319.36
  6. Step 6: Final answer
    x = 257.51

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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.