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Finding the Fourth Proportional to 193.50, 290.30 and 65.25

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Solution

The fourth proportional to 193.50, 290.30 and 65.25 is: 97.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.50 : 290.30 = 65.25 : x
  2. Step 2: Convert to fraction form
    193.50/290.30 = 65.25/x
  3. Step 3: Cross multiply
    193.50x = 290.30 × 65.25
  4. Step 4: Simplify right side
    193.50x = 18,941.75
  5. Step 5: Solve for x
    x = 18,941.75/193.50
  6. Step 6: Final answer
    x = 97.89

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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.