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Finding the Fourth Proportional to 441.22, 661.81 and 210.22

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Solution

The fourth proportional to 441.22, 661.81 and 210.22 is: 315.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.22 : 661.81 = 210.22 : x
  2. Step 2: Convert to fraction form
    441.22/661.81 = 210.22/x
  3. Step 3: Cross multiply
    441.22x = 661.81 × 210.22
  4. Step 4: Simplify right side
    441.22x = 139,125.70
  5. Step 5: Solve for x
    x = 139,125.70/441.22
  6. Step 6: Final answer
    x = 315.32

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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.