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Finding the Fourth Proportional to 186.62, 279.91 and 49.68

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Solution

The fourth proportional to 186.62, 279.91 and 49.68 is: 74.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.62 : 279.91 = 49.68 : x
  2. Step 2: Convert to fraction form
    186.62/279.91 = 49.68/x
  3. Step 3: Cross multiply
    186.62x = 279.91 × 49.68
  4. Step 4: Simplify right side
    186.62x = 13,905.21
  5. Step 5: Solve for x
    x = 13,905.21/186.62
  6. Step 6: Final answer
    x = 74.51

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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.