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Finding the Fourth Proportional to 407.97, 612.09 and 134.10

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Solution

The fourth proportional to 407.97, 612.09 and 134.10 is: 201.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.97 : 612.09 = 134.10 : x
  2. Step 2: Convert to fraction form
    407.97/612.09 = 134.10/x
  3. Step 3: Cross multiply
    407.97x = 612.09 × 134.10
  4. Step 4: Simplify right side
    407.97x = 82,081.27
  5. Step 5: Solve for x
    x = 82,081.27/407.97
  6. Step 6: Final answer
    x = 201.19

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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.