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Finding the Fourth Proportional to 187.02, 257.31 and 163.62

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Solution

The fourth proportional to 187.02, 257.31 and 163.62 is: 225.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.02 : 257.31 = 163.62 : x
  2. Step 2: Convert to fraction form
    187.02/257.31 = 163.62/x
  3. Step 3: Cross multiply
    187.02x = 257.31 × 163.62
  4. Step 4: Simplify right side
    187.02x = 42,101.06
  5. Step 5: Solve for x
    x = 42,101.06/187.02
  6. Step 6: Final answer
    x = 225.12

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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.