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Finding the Fourth Proportional to 585.99, 878.81 and 220.86

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Solution

The fourth proportional to 585.99, 878.81 and 220.86 is: 331.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.99 : 878.81 = 220.86 : x
  2. Step 2: Convert to fraction form
    585.99/878.81 = 220.86/x
  3. Step 3: Cross multiply
    585.99x = 878.81 × 220.86
  4. Step 4: Simplify right side
    585.99x = 194,092.87
  5. Step 5: Solve for x
    x = 194,092.87/585.99
  6. Step 6: Final answer
    x = 331.22

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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.