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Finding the Fourth Proportional to 326.19, 488.85 and 133.59

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Solution

The fourth proportional to 326.19, 488.85 and 133.59 is: 200.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.19 : 488.85 = 133.59 : x
  2. Step 2: Convert to fraction form
    326.19/488.85 = 133.59/x
  3. Step 3: Cross multiply
    326.19x = 488.85 × 133.59
  4. Step 4: Simplify right side
    326.19x = 65,305.47
  5. Step 5: Solve for x
    x = 65,305.47/326.19
  6. Step 6: Final answer
    x = 200.21

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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.