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Finding the Fourth Proportional to 441.54, 661.91 and 210.29

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Solution

The fourth proportional to 441.54, 661.91 and 210.29 is: 315.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.54 : 661.91 = 210.29 : x
  2. Step 2: Convert to fraction form
    441.54/661.91 = 210.29/x
  3. Step 3: Cross multiply
    441.54x = 661.91 × 210.29
  4. Step 4: Simplify right side
    441.54x = 139,188.69
  5. Step 5: Solve for x
    x = 139,188.69/441.54
  6. Step 6: Final answer
    x = 315.23

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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.