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Finding the Fourth Proportional to 878.63, 1,318.50 and 365.63

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Solution

The fourth proportional to 878.63, 1,318.50 and 365.63 is: 548.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.63 : 1,318.50 = 365.63 : x
  2. Step 2: Convert to fraction form
    878.63/1,318.50 = 365.63/x
  3. Step 3: Cross multiply
    878.63x = 1,318.50 × 365.63
  4. Step 4: Simplify right side
    878.63x = 482,076.56
  5. Step 5: Solve for x
    x = 482,076.56/878.63
  6. Step 6: Final answer
    x = 548.67

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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.