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Finding the Fourth Proportional to 880.44, 1,318.90 and 418.67

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Solution

The fourth proportional to 880.44, 1,318.90 and 418.67 is: 627.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.44 : 1,318.90 = 418.67 : x
  2. Step 2: Convert to fraction form
    880.44/1,318.90 = 418.67/x
  3. Step 3: Cross multiply
    880.44x = 1,318.90 × 418.67
  4. Step 4: Simplify right side
    880.44x = 552,183.86
  5. Step 5: Solve for x
    x = 552,183.86/880.44
  6. Step 6: Final answer
    x = 627.17

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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.