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Finding the Fourth Proportional to 576.42, 864.81 and 211.32

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Solution

The fourth proportional to 576.42, 864.81 and 211.32 is: 317.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.42 : 864.81 = 211.32 : x
  2. Step 2: Convert to fraction form
    576.42/864.81 = 211.32/x
  3. Step 3: Cross multiply
    576.42x = 864.81 × 211.32
  4. Step 4: Simplify right side
    576.42x = 182,751.65
  5. Step 5: Solve for x
    x = 182,751.65/576.42
  6. Step 6: Final answer
    x = 317.05

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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.