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Finding the Fourth Proportional to 186.72, 278.62 and 166.26

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Solution

The fourth proportional to 186.72, 278.62 and 166.26 is: 248.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.72 : 278.62 = 166.26 : x
  2. Step 2: Convert to fraction form
    186.72/278.62 = 166.26/x
  3. Step 3: Cross multiply
    186.72x = 278.62 × 166.26
  4. Step 4: Simplify right side
    186.72x = 46,323.36
  5. Step 5: Solve for x
    x = 46,323.36/186.72
  6. Step 6: Final answer
    x = 248.09

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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.