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Finding the Fourth Proportional to 707.26, 976.11 and 396.82

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Solution

The fourth proportional to 707.26, 976.11 and 396.82 is: 547.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.26 : 976.11 = 396.82 : x
  2. Step 2: Convert to fraction form
    707.26/976.11 = 396.82/x
  3. Step 3: Cross multiply
    707.26x = 976.11 × 396.82
  4. Step 4: Simplify right side
    707.26x = 387,339.97
  5. Step 5: Solve for x
    x = 387,339.97/707.26
  6. Step 6: Final answer
    x = 547.66

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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.