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Finding the Fourth Proportional to 878.00, 1,313.87 and 631.44

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Solution

The fourth proportional to 878.00, 1,313.87 and 631.44 is: 944.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.00 : 1,313.87 = 631.44 : x
  2. Step 2: Convert to fraction form
    878.00/1,313.87 = 631.44/x
  3. Step 3: Cross multiply
    878.00x = 1,313.87 × 631.44
  4. Step 4: Simplify right side
    878.00x = 829,626.92
  5. Step 5: Solve for x
    x = 829,626.92/878.00
  6. Step 6: Final answer
    x = 944.91

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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.