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Finding the Fourth Proportional to 441.04, 661.72 and 213.04

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Solution

The fourth proportional to 441.04, 661.72 and 213.04 is: 319.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.04 : 661.72 = 213.04 : x
  2. Step 2: Convert to fraction form
    441.04/661.72 = 213.04/x
  3. Step 3: Cross multiply
    441.04x = 661.72 × 213.04
  4. Step 4: Simplify right side
    441.04x = 140,972.83
  5. Step 5: Solve for x
    x = 140,972.83/441.04
  6. Step 6: Final answer
    x = 319.64

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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.