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Finding the Fourth Proportional to 325.77, 449.65 and 215.21

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Solution

The fourth proportional to 325.77, 449.65 and 215.21 is: 297.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.77 : 449.65 = 215.21 : x
  2. Step 2: Convert to fraction form
    325.77/449.65 = 215.21/x
  3. Step 3: Cross multiply
    325.77x = 449.65 × 215.21
  4. Step 4: Simplify right side
    325.77x = 96,766.93
  5. Step 5: Solve for x
    x = 96,766.93/325.77
  6. Step 6: Final answer
    x = 297.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.