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Finding the Fourth Proportional to 585.75, 878.59 and 220.49

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Solution

The fourth proportional to 585.75, 878.59 and 220.49 is: 330.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.75 : 878.59 = 220.49 : x
  2. Step 2: Convert to fraction form
    585.75/878.59 = 220.49/x
  3. Step 3: Cross multiply
    585.75x = 878.59 × 220.49
  4. Step 4: Simplify right side
    585.75x = 193,719.21
  5. Step 5: Solve for x
    x = 193,719.21/585.75
  6. Step 6: Final answer
    x = 330.72

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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.