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Finding the Fourth Proportional to 493.18, 739.76 and 146.51

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Solution

The fourth proportional to 493.18, 739.76 and 146.51 is: 219.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.18 : 739.76 = 146.51 : x
  2. Step 2: Convert to fraction form
    493.18/739.76 = 146.51/x
  3. Step 3: Cross multiply
    493.18x = 739.76 × 146.51
  4. Step 4: Simplify right side
    493.18x = 108,382.24
  5. Step 5: Solve for x
    x = 108,382.24/493.18
  6. Step 6: Final answer
    x = 219.76

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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.