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Finding the Fourth Proportional to 585.51, 878.49 and 220.39

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Solution

The fourth proportional to 585.51, 878.49 and 220.39 is: 330.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.51 : 878.49 = 220.39 : x
  2. Step 2: Convert to fraction form
    585.51/878.49 = 220.39/x
  3. Step 3: Cross multiply
    585.51x = 878.49 × 220.39
  4. Step 4: Simplify right side
    585.51x = 193,610.41
  5. Step 5: Solve for x
    x = 193,610.41/585.51
  6. Step 6: Final answer
    x = 330.67

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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.