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Finding the Fourth Proportional to 298.69, 447.51 and 266.90

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Solution

The fourth proportional to 298.69, 447.51 and 266.90 is: 399.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.69 : 447.51 = 266.90 : x
  2. Step 2: Convert to fraction form
    298.69/447.51 = 266.90/x
  3. Step 3: Cross multiply
    298.69x = 447.51 × 266.90
  4. Step 4: Simplify right side
    298.69x = 119,440.42
  5. Step 5: Solve for x
    x = 119,440.42/298.69
  6. Step 6: Final answer
    x = 399.88

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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.