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Finding the Fourth Proportional to 562.20, 843.66 and 215.79

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Solution

The fourth proportional to 562.20, 843.66 and 215.79 is: 323.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.20 : 843.66 = 215.79 : x
  2. Step 2: Convert to fraction form
    562.20/843.66 = 215.79/x
  3. Step 3: Cross multiply
    562.20x = 843.66 × 215.79
  4. Step 4: Simplify right side
    562.20x = 182,053.39
  5. Step 5: Solve for x
    x = 182,053.39/562.20
  6. Step 6: Final answer
    x = 323.82

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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.