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Finding the Fourth Proportional to 298.55, 447.54 and 115.79

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Solution

The fourth proportional to 298.55, 447.54 and 115.79 is: 173.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.55 : 447.54 = 115.79 : x
  2. Step 2: Convert to fraction form
    298.55/447.54 = 115.79/x
  3. Step 3: Cross multiply
    298.55x = 447.54 × 115.79
  4. Step 4: Simplify right side
    298.55x = 51,820.66
  5. Step 5: Solve for x
    x = 51,820.66/298.55
  6. Step 6: Final answer
    x = 173.57

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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.