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Finding the Fourth Proportional to 441.56, 661.91 and 210.65

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Solution

The fourth proportional to 441.56, 661.91 and 210.65 is: 315.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.56 : 661.91 = 210.65 : x
  2. Step 2: Convert to fraction form
    441.56/661.91 = 210.65/x
  3. Step 3: Cross multiply
    441.56x = 661.91 × 210.65
  4. Step 4: Simplify right side
    441.56x = 139,426.98
  5. Step 5: Solve for x
    x = 139,426.98/441.56
  6. Step 6: Final answer
    x = 315.76

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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.