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Finding the Fourth Proportional to 576.60, 864.84 and 211.68

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Solution

The fourth proportional to 576.60, 864.84 and 211.68 is: 317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.60 : 864.84 = 211.68 : x
  2. Step 2: Convert to fraction form
    576.60/864.84 = 211.68/x
  3. Step 3: Cross multiply
    576.60x = 864.84 × 211.68
  4. Step 4: Simplify right side
    576.60x = 183,069.33
  5. Step 5: Solve for x
    x = 183,069.33/576.60
  6. Step 6: Final answer
    x = 317.50

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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.