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Finding the Fourth Proportional to 186.36, 278.31 and 155.68

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Solution

The fourth proportional to 186.36, 278.31 and 155.68 is: 232.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.36 : 278.31 = 155.68 : x
  2. Step 2: Convert to fraction form
    186.36/278.31 = 155.68/x
  3. Step 3: Cross multiply
    186.36x = 278.31 × 155.68
  4. Step 4: Simplify right side
    186.36x = 43,327.30
  5. Step 5: Solve for x
    x = 43,327.30/186.36
  6. Step 6: Final answer
    x = 232.49

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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.