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Finding the Fourth Proportional to 461.85, 691.71 and 379.86

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Solution

The fourth proportional to 461.85, 691.71 and 379.86 is: 568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.85 : 691.71 = 379.86 : x
  2. Step 2: Convert to fraction form
    461.85/691.71 = 379.86/x
  3. Step 3: Cross multiply
    461.85x = 691.71 × 379.86
  4. Step 4: Simplify right side
    461.85x = 262,752.96
  5. Step 5: Solve for x
    x = 262,752.96/461.85
  6. Step 6: Final answer
    x = 568.91

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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.