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Finding the Fourth Proportional to 296.72, 445.09 and 129.93

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Solution

The fourth proportional to 296.72, 445.09 and 129.93 is: 194.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.72 : 445.09 = 129.93 : x
  2. Step 2: Convert to fraction form
    296.72/445.09 = 129.93/x
  3. Step 3: Cross multiply
    296.72x = 445.09 × 129.93
  4. Step 4: Simplify right side
    296.72x = 57,830.54
  5. Step 5: Solve for x
    x = 57,830.54/296.72
  6. Step 6: Final answer
    x = 194.90

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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.