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Finding the Fourth Proportional to 878.96, 1,318.52 and 624.56

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Solution

The fourth proportional to 878.96, 1,318.52 and 624.56 is: 936.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.96 : 1,318.52 = 624.56 : x
  2. Step 2: Convert to fraction form
    878.96/1,318.52 = 624.56/x
  3. Step 3: Cross multiply
    878.96x = 1,318.52 × 624.56
  4. Step 4: Simplify right side
    878.96x = 823,494.85
  5. Step 5: Solve for x
    x = 823,494.85/878.96
  6. Step 6: Final answer
    x = 936.90

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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.