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Finding the Fourth Proportional to 298.36, 447.20 and 161.47

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Solution

The fourth proportional to 298.36, 447.20 and 161.47 is: 242.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.36 : 447.20 = 161.47 : x
  2. Step 2: Convert to fraction form
    298.36/447.20 = 161.47/x
  3. Step 3: Cross multiply
    298.36x = 447.20 × 161.47
  4. Step 4: Simplify right side
    298.36x = 72,206.34
  5. Step 5: Solve for x
    x = 72,206.34/298.36
  6. Step 6: Final answer
    x = 242.01

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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.