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Finding the Fourth Proportional to 441.38, 662.21 and 210.57

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Solution

The fourth proportional to 441.38, 662.21 and 210.57 is: 315.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.38 : 662.21 = 210.57 : x
  2. Step 2: Convert to fraction form
    441.38/662.21 = 210.57/x
  3. Step 3: Cross multiply
    441.38x = 662.21 × 210.57
  4. Step 4: Simplify right side
    441.38x = 139,438.81
  5. Step 5: Solve for x
    x = 139,438.81/441.38
  6. Step 6: Final answer
    x = 315.91

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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.