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Finding the Fourth Proportional to 576.91, 796.43 and 391.38

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Solution

The fourth proportional to 576.91, 796.43 and 391.38 is: 540.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.91 : 796.43 = 391.38 : x
  2. Step 2: Convert to fraction form
    576.91/796.43 = 391.38/x
  3. Step 3: Cross multiply
    576.91x = 796.43 × 391.38
  4. Step 4: Simplify right side
    576.91x = 311,706.77
  5. Step 5: Solve for x
    x = 311,706.77/576.91
  6. Step 6: Final answer
    x = 540.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.