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Finding the Fourth Proportional to 585.31, 878.02 and 220.41

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Solution

The fourth proportional to 585.31, 878.02 and 220.41 is: 330.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.31 : 878.02 = 220.41 : x
  2. Step 2: Convert to fraction form
    585.31/878.02 = 220.41/x
  3. Step 3: Cross multiply
    585.31x = 878.02 × 220.41
  4. Step 4: Simplify right side
    585.31x = 193,524.39
  5. Step 5: Solve for x
    x = 193,524.39/585.31
  6. Step 6: Final answer
    x = 330.64

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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.