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Finding the Fourth Proportional to 576.89, 865.31 and 186.90

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Solution

The fourth proportional to 576.89, 865.31 and 186.90 is: 280.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.89 : 865.31 = 186.90 : x
  2. Step 2: Convert to fraction form
    576.89/865.31 = 186.90/x
  3. Step 3: Cross multiply
    576.89x = 865.31 × 186.90
  4. Step 4: Simplify right side
    576.89x = 161,725.50
  5. Step 5: Solve for x
    x = 161,725.50/576.89
  6. Step 6: Final answer
    x = 280.34

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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.