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Finding the Fourth Proportional to 576.61, 865.25 and 211.39

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Solution

The fourth proportional to 576.61, 865.25 and 211.39 is: 317.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.61 : 865.25 = 211.39 : x
  2. Step 2: Convert to fraction form
    576.61/865.25 = 211.39/x
  3. Step 3: Cross multiply
    576.61x = 865.25 × 211.39
  4. Step 4: Simplify right side
    576.61x = 182,905.20
  5. Step 5: Solve for x
    x = 182,905.20/576.61
  6. Step 6: Final answer
    x = 317.21

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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.