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Finding the Fourth Proportional to 204.18, 305.91 and 186.18

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Solution

The fourth proportional to 204.18, 305.91 and 186.18 is: 278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.18 : 305.91 = 186.18 : x
  2. Step 2: Convert to fraction form
    204.18/305.91 = 186.18/x
  3. Step 3: Cross multiply
    204.18x = 305.91 × 186.18
  4. Step 4: Simplify right side
    204.18x = 56,954.32
  5. Step 5: Solve for x
    x = 56,954.32/204.18
  6. Step 6: Final answer
    x = 278.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.