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Finding the Fourth Proportional to 491.96, 738.20 and 218.24

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Solution

The fourth proportional to 491.96, 738.20 and 218.24 is: 327.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.96 : 738.20 = 218.24 : x
  2. Step 2: Convert to fraction form
    491.96/738.20 = 218.24/x
  3. Step 3: Cross multiply
    491.96x = 738.20 × 218.24
  4. Step 4: Simplify right side
    491.96x = 161,099.99
  5. Step 5: Solve for x
    x = 161,099.99/491.96
  6. Step 6: Final answer
    x = 327.47

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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.