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Finding the Fourth Proportional to 325.86, 449.73 and 209.76

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Solution

The fourth proportional to 325.86, 449.73 and 209.76 is: 289.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.86 : 449.73 = 209.76 : x
  2. Step 2: Convert to fraction form
    325.86/449.73 = 209.76/x
  3. Step 3: Cross multiply
    325.86x = 449.73 × 209.76
  4. Step 4: Simplify right side
    325.86x = 94,335.36
  5. Step 5: Solve for x
    x = 94,335.36/325.86
  6. Step 6: Final answer
    x = 289.50

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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.