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Finding the Fourth Proportional to 186.72, 278.66 and 181.86

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Solution

The fourth proportional to 186.72, 278.66 and 181.86 is: 271.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.72 : 278.66 = 181.86 : x
  2. Step 2: Convert to fraction form
    186.72/278.66 = 181.86/x
  3. Step 3: Cross multiply
    186.72x = 278.66 × 181.86
  4. Step 4: Simplify right side
    186.72x = 50,677.11
  5. Step 5: Solve for x
    x = 50,677.11/186.72
  6. Step 6: Final answer
    x = 271.41

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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.