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Finding the Fourth Proportional to 298.49, 411.99 and 211.19

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Solution

The fourth proportional to 298.49, 411.99 and 211.19 is: 291.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.49 : 411.99 = 211.19 : x
  2. Step 2: Convert to fraction form
    298.49/411.99 = 211.19/x
  3. Step 3: Cross multiply
    298.49x = 411.99 × 211.19
  4. Step 4: Simplify right side
    298.49x = 87,008.17
  5. Step 5: Solve for x
    x = 87,008.17/298.49
  6. Step 6: Final answer
    x = 291.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.