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Finding the Fourth Proportional to 421.33, 632.09 and 132.77

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Solution

The fourth proportional to 421.33, 632.09 and 132.77 is: 199.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.33 : 632.09 = 132.77 : x
  2. Step 2: Convert to fraction form
    421.33/632.09 = 132.77/x
  3. Step 3: Cross multiply
    421.33x = 632.09 × 132.77
  4. Step 4: Simplify right side
    421.33x = 83,919.43
  5. Step 5: Solve for x
    x = 83,919.43/421.33
  6. Step 6: Final answer
    x = 199.18

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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.