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Finding the Fourth Proportional to 576.22, 864.34 and 186.21

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Solution

The fourth proportional to 576.22, 864.34 and 186.21 is: 279.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.22 : 864.34 = 186.21 : x
  2. Step 2: Convert to fraction form
    576.22/864.34 = 186.21/x
  3. Step 3: Cross multiply
    576.22x = 864.34 × 186.21
  4. Step 4: Simplify right side
    576.22x = 160,944.43
  5. Step 5: Solve for x
    x = 160,944.43/576.22
  6. Step 6: Final answer
    x = 279.31

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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.