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Finding the Fourth Proportional to 298.16, 447.46 and 115.70

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Solution

The fourth proportional to 298.16, 447.46 and 115.70 is: 173.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.16 : 447.46 = 115.70 : x
  2. Step 2: Convert to fraction form
    298.16/447.46 = 115.70/x
  3. Step 3: Cross multiply
    298.16x = 447.46 × 115.70
  4. Step 4: Simplify right side
    298.16x = 51,771.12
  5. Step 5: Solve for x
    x = 51,771.12/298.16
  6. Step 6: Final answer
    x = 173.64

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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.