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Finding the Fourth Proportional to 259.72, 391.15 and 196.04

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Solution

The fourth proportional to 259.72, 391.15 and 196.04 is: 295.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.72 : 391.15 = 196.04 : x
  2. Step 2: Convert to fraction form
    259.72/391.15 = 196.04/x
  3. Step 3: Cross multiply
    259.72x = 391.15 × 196.04
  4. Step 4: Simplify right side
    259.72x = 76,681.05
  5. Step 5: Solve for x
    x = 76,681.05/259.72
  6. Step 6: Final answer
    x = 295.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.