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Finding the Fourth Proportional to 406.10, 609.18 and 132.18

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Solution

The fourth proportional to 406.10, 609.18 and 132.18 is: 198.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.10 : 609.18 = 132.18 : x
  2. Step 2: Convert to fraction form
    406.10/609.18 = 132.18/x
  3. Step 3: Cross multiply
    406.10x = 609.18 × 132.18
  4. Step 4: Simplify right side
    406.10x = 80,521.41
  5. Step 5: Solve for x
    x = 80,521.41/406.10
  6. Step 6: Final answer
    x = 198.28

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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.