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Finding the Fourth Proportional to 193.79, 290.34 and 186.68

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Solution

The fourth proportional to 193.79, 290.34 and 186.68 is: 279.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.79 : 290.34 = 186.68 : x
  2. Step 2: Convert to fraction form
    193.79/290.34 = 186.68/x
  3. Step 3: Cross multiply
    193.79x = 290.34 × 186.68
  4. Step 4: Simplify right side
    193.79x = 54,199.22
  5. Step 5: Solve for x
    x = 54,199.22/193.79
  6. Step 6: Final answer
    x = 279.69

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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.