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Finding the Fourth Proportional to 186.84, 258.13 and 158.22

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Solution

The fourth proportional to 186.84, 258.13 and 158.22 is: 218.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.84 : 258.13 = 158.22 : x
  2. Step 2: Convert to fraction form
    186.84/258.13 = 158.22/x
  3. Step 3: Cross multiply
    186.84x = 258.13 × 158.22
  4. Step 4: Simplify right side
    186.84x = 40,841.33
  5. Step 5: Solve for x
    x = 40,841.33/186.84
  6. Step 6: Final answer
    x = 218.59

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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.