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Finding the Fourth Proportional to 493.03, 739.79 and 328.61

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Solution

The fourth proportional to 493.03, 739.79 and 328.61 is: 493.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.03 : 739.79 = 328.61 : x
  2. Step 2: Convert to fraction form
    493.03/739.79 = 328.61/x
  3. Step 3: Cross multiply
    493.03x = 739.79 × 328.61
  4. Step 4: Simplify right side
    493.03x = 243,103.21
  5. Step 5: Solve for x
    x = 243,103.21/493.03
  6. Step 6: Final answer
    x = 493.08

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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.