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Finding the Fourth Proportional to 585.72, 878.73 and 220.61

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Solution

The fourth proportional to 585.72, 878.73 and 220.61 is: 330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.72 : 878.73 = 220.61 : x
  2. Step 2: Convert to fraction form
    585.72/878.73 = 220.61/x
  3. Step 3: Cross multiply
    585.72x = 878.73 × 220.61
  4. Step 4: Simplify right side
    585.72x = 193,856.63
  5. Step 5: Solve for x
    x = 193,856.63/585.72
  6. Step 6: Final answer
    x = 330.97

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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.