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Finding the Fourth Proportional to 187.63, 258.34 and 154.83

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Solution

The fourth proportional to 187.63, 258.34 and 154.83 is: 213.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.63 : 258.34 = 154.83 : x
  2. Step 2: Convert to fraction form
    187.63/258.34 = 154.83/x
  3. Step 3: Cross multiply
    187.63x = 258.34 × 154.83
  4. Step 4: Simplify right side
    187.63x = 39,998.01
  5. Step 5: Solve for x
    x = 39,998.01/187.63
  6. Step 6: Final answer
    x = 213.17

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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.