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Finding the Fourth Proportional to 298.10, 447.08 and 211.18

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Solution

The fourth proportional to 298.10, 447.08 and 211.18 is: 316.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.10 : 447.08 = 211.18 : x
  2. Step 2: Convert to fraction form
    298.10/447.08 = 211.18/x
  3. Step 3: Cross multiply
    298.10x = 447.08 × 211.18
  4. Step 4: Simplify right side
    298.10x = 94,412.71
  5. Step 5: Solve for x
    x = 94,412.71/298.10
  6. Step 6: Final answer
    x = 316.71

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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.