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Finding the Fourth Proportional to 298.49, 411.90 and 174.15

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Solution

The fourth proportional to 298.49, 411.90 and 174.15 is: 240.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.49 : 411.90 = 174.15 : x
  2. Step 2: Convert to fraction form
    298.49/411.90 = 174.15/x
  3. Step 3: Cross multiply
    298.49x = 411.90 × 174.15
  4. Step 4: Simplify right side
    298.49x = 71,732.71
  5. Step 5: Solve for x
    x = 71,732.71/298.49
  6. Step 6: Final answer
    x = 240.32

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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.