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Finding the Fourth Proportional to 325.68, 449.46 and 209.22

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Solution

The fourth proportional to 325.68, 449.46 and 209.22 is: 288.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.68 : 449.46 = 209.22 : x
  2. Step 2: Convert to fraction form
    325.68/449.46 = 209.22/x
  3. Step 3: Cross multiply
    325.68x = 449.46 × 209.22
  4. Step 4: Simplify right side
    325.68x = 94,036.02
  5. Step 5: Solve for x
    x = 94,036.02/325.68
  6. Step 6: Final answer
    x = 288.74

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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.