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Finding the Fourth Proportional to 493.15, 739.74 and 146.47

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Solution

The fourth proportional to 493.15, 739.74 and 146.47 is: 219.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.15 : 739.74 = 146.47 : x
  2. Step 2: Convert to fraction form
    493.15/739.74 = 146.47/x
  3. Step 3: Cross multiply
    493.15x = 739.74 × 146.47
  4. Step 4: Simplify right side
    493.15x = 108,348.99
  5. Step 5: Solve for x
    x = 108,348.99/493.15
  6. Step 6: Final answer
    x = 219.71

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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.