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Finding the Fourth Proportional to 577.31, 865.97 and 211.94

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Solution

The fourth proportional to 577.31, 865.97 and 211.94 is: 317.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.31 : 865.97 = 211.94 : x
  2. Step 2: Convert to fraction form
    577.31/865.97 = 211.94/x
  3. Step 3: Cross multiply
    577.31x = 865.97 × 211.94
  4. Step 4: Simplify right side
    577.31x = 183,532.62
  5. Step 5: Solve for x
    x = 183,532.62/577.31
  6. Step 6: Final answer
    x = 317.91

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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.