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Finding the Fourth Proportional to 298.84, 447.76 and 211.74

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Solution

The fourth proportional to 298.84, 447.76 and 211.74 is: 317.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.84 : 447.76 = 211.74 : x
  2. Step 2: Convert to fraction form
    298.84/447.76 = 211.74/x
  3. Step 3: Cross multiply
    298.84x = 447.76 × 211.74
  4. Step 4: Simplify right side
    298.84x = 94,808.70
  5. Step 5: Solve for x
    x = 94,808.70/298.84
  6. Step 6: Final answer
    x = 317.26

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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.