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Finding the Fourth Proportional to 406.55, 609.71 and 132.50

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Solution

The fourth proportional to 406.55, 609.71 and 132.50 is: 198.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.55 : 609.71 = 132.50 : x
  2. Step 2: Convert to fraction form
    406.55/609.71 = 132.50/x
  3. Step 3: Cross multiply
    406.55x = 609.71 × 132.50
  4. Step 4: Simplify right side
    406.55x = 80,782.86
  5. Step 5: Solve for x
    x = 80,782.86/406.55
  6. Step 6: Final answer
    x = 198.71

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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.