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Finding the Fourth Proportional to 186.84, 258.18 and 162.78

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Solution

The fourth proportional to 186.84, 258.18 and 162.78 is: 224.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.84 : 258.18 = 162.78 : x
  2. Step 2: Convert to fraction form
    186.84/258.18 = 162.78/x
  3. Step 3: Cross multiply
    186.84x = 258.18 × 162.78
  4. Step 4: Simplify right side
    186.84x = 42,026.54
  5. Step 5: Solve for x
    x = 42,026.54/186.84
  6. Step 6: Final answer
    x = 224.93

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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.