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Finding the Fourth Proportional to 461.42, 691.48 and 298.81

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Solution

The fourth proportional to 461.42, 691.48 and 298.81 is: 447.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.42 : 691.48 = 298.81 : x
  2. Step 2: Convert to fraction form
    461.42/691.48 = 298.81/x
  3. Step 3: Cross multiply
    461.42x = 691.48 × 298.81
  4. Step 4: Simplify right side
    461.42x = 206,621.14
  5. Step 5: Solve for x
    x = 206,621.14/461.42
  6. Step 6: Final answer
    x = 447.79

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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.