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Finding the Fourth Proportional to 194.48, 291.78 and 129.44

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Solution

The fourth proportional to 194.48, 291.78 and 129.44 is: 194.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.48 : 291.78 = 129.44 : x
  2. Step 2: Convert to fraction form
    194.48/291.78 = 129.44/x
  3. Step 3: Cross multiply
    194.48x = 291.78 × 129.44
  4. Step 4: Simplify right side
    194.48x = 37,768.00
  5. Step 5: Solve for x
    x = 37,768.00/194.48
  6. Step 6: Final answer
    x = 194.20

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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.