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Finding the Fourth Proportional to 187.14, 258.60 and 178.74

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Solution

The fourth proportional to 187.14, 258.60 and 178.74 is: 246.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.14 : 258.60 = 178.74 : x
  2. Step 2: Convert to fraction form
    187.14/258.60 = 178.74/x
  3. Step 3: Cross multiply
    187.14x = 258.60 × 178.74
  4. Step 4: Simplify right side
    187.14x = 46,222.16
  5. Step 5: Solve for x
    x = 46,222.16/187.14
  6. Step 6: Final answer
    x = 246.99

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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.