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Finding the Fourth Proportional to 186.66, 278.34 and 161.16

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Solution

The fourth proportional to 186.66, 278.34 and 161.16 is: 240.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.66 : 278.34 = 161.16 : x
  2. Step 2: Convert to fraction form
    186.66/278.34 = 161.16/x
  3. Step 3: Cross multiply
    186.66x = 278.34 × 161.16
  4. Step 4: Simplify right side
    186.66x = 44,857.27
  5. Step 5: Solve for x
    x = 44,857.27/186.66
  6. Step 6: Final answer
    x = 240.32

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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.