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Finding the Fourth Proportional to 493.16, 739.78 and 218.96

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Solution

The fourth proportional to 493.16, 739.78 and 218.96 is: 328.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.16 : 739.78 = 218.96 : x
  2. Step 2: Convert to fraction form
    493.16/739.78 = 218.96/x
  3. Step 3: Cross multiply
    493.16x = 739.78 × 218.96
  4. Step 4: Simplify right side
    493.16x = 161,982.23
  5. Step 5: Solve for x
    x = 161,982.23/493.16
  6. Step 6: Final answer
    x = 328.46

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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.