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Finding the Fourth Proportional to 195.40, 292.86 and 79.69

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Solution

The fourth proportional to 195.40, 292.86 and 79.69 is: 119.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.40 : 292.86 = 79.69 : x
  2. Step 2: Convert to fraction form
    195.40/292.86 = 79.69/x
  3. Step 3: Cross multiply
    195.40x = 292.86 × 79.69
  4. Step 4: Simplify right side
    195.40x = 23,337.48
  5. Step 5: Solve for x
    x = 23,337.48/195.40
  6. Step 6: Final answer
    x = 119.44

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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.