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Finding the Fourth Proportional to 298.14, 411.56 and 219.31

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Solution

The fourth proportional to 298.14, 411.56 and 219.31 is: 302.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.14 : 411.56 = 219.31 : x
  2. Step 2: Convert to fraction form
    298.14/411.56 = 219.31/x
  3. Step 3: Cross multiply
    298.14x = 411.56 × 219.31
  4. Step 4: Simplify right side
    298.14x = 90,259.22
  5. Step 5: Solve for x
    x = 90,259.22/298.14
  6. Step 6: Final answer
    x = 302.74

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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.