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Finding the Fourth Proportional to 493.35, 739.80 and 219.30

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Solution

The fourth proportional to 493.35, 739.80 and 219.30 is: 328.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.35 : 739.80 = 219.30 : x
  2. Step 2: Convert to fraction form
    493.35/739.80 = 219.30/x
  3. Step 3: Cross multiply
    493.35x = 739.80 × 219.30
  4. Step 4: Simplify right side
    493.35x = 162,238.14
  5. Step 5: Solve for x
    x = 162,238.14/493.35
  6. Step 6: Final answer
    x = 328.85

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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.