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Finding the Fourth Proportional to 298.16, 447.16 and 135.76

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Solution

The fourth proportional to 298.16, 447.16 and 135.76 is: 203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.16 : 447.16 = 135.76 : x
  2. Step 2: Convert to fraction form
    298.16/447.16 = 135.76/x
  3. Step 3: Cross multiply
    298.16x = 447.16 × 135.76
  4. Step 4: Simplify right side
    298.16x = 60,706.44
  5. Step 5: Solve for x
    x = 60,706.44/298.16
  6. Step 6: Final answer
    x = 203.60

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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.