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Finding the Fourth Proportional to 187.10, 278.98 and 173.43

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Solution

The fourth proportional to 187.10, 278.98 and 173.43 is: 258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.10 : 278.98 = 173.43 : x
  2. Step 2: Convert to fraction form
    187.10/278.98 = 173.43/x
  3. Step 3: Cross multiply
    187.10x = 278.98 × 173.43
  4. Step 4: Simplify right side
    187.10x = 48,383.50
  5. Step 5: Solve for x
    x = 48,383.50/187.10
  6. Step 6: Final answer
    x = 258.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.