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Finding the Fourth Proportional to 298.46, 411.78 and 243.10

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Solution

The fourth proportional to 298.46, 411.78 and 243.10 is: 335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.46 : 411.78 = 243.10 : x
  2. Step 2: Convert to fraction form
    298.46/411.78 = 243.10/x
  3. Step 3: Cross multiply
    298.46x = 411.78 × 243.10
  4. Step 4: Simplify right side
    298.46x = 100,101.47
  5. Step 5: Solve for x
    x = 100,101.47/298.46
  6. Step 6: Final answer
    x = 335.40

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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.