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Finding the Fourth Proportional to 576.57, 865.31 and 211.47

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Solution

The fourth proportional to 576.57, 865.31 and 211.47 is: 317.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.57 : 865.31 = 211.47 : x
  2. Step 2: Convert to fraction form
    576.57/865.31 = 211.47/x
  3. Step 3: Cross multiply
    576.57x = 865.31 × 211.47
  4. Step 4: Simplify right side
    576.57x = 182,987.11
  5. Step 5: Solve for x
    x = 182,987.11/576.57
  6. Step 6: Final answer
    x = 317.37

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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.