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Finding the Fourth Proportional to 406.51, 609.68 and 132.61

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Solution

The fourth proportional to 406.51, 609.68 and 132.61 is: 198.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.51 : 609.68 = 132.61 : x
  2. Step 2: Convert to fraction form
    406.51/609.68 = 132.61/x
  3. Step 3: Cross multiply
    406.51x = 609.68 × 132.61
  4. Step 4: Simplify right side
    406.51x = 80,848.47
  5. Step 5: Solve for x
    x = 80,848.47/406.51
  6. Step 6: Final answer
    x = 198.89

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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.