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Finding the Fourth Proportional to 303.39, 455.09 and 129.91

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Solution

The fourth proportional to 303.39, 455.09 and 129.91 is: 194.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.39 : 455.09 = 129.91 : x
  2. Step 2: Convert to fraction form
    303.39/455.09 = 129.91/x
  3. Step 3: Cross multiply
    303.39x = 455.09 × 129.91
  4. Step 4: Simplify right side
    303.39x = 59,120.09
  5. Step 5: Solve for x
    x = 59,120.09/303.39
  6. Step 6: Final answer
    x = 194.87

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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.