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Finding the Fourth Proportional to 878.56, 1,322.52 and 799.20

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Solution

The fourth proportional to 878.56, 1,322.52 and 799.20 is: 1,203.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.56 : 1,322.52 = 799.20 : x
  2. Step 2: Convert to fraction form
    878.56/1,322.52 = 799.20/x
  3. Step 3: Cross multiply
    878.56x = 1,322.52 × 799.20
  4. Step 4: Simplify right side
    878.56x = 1,056,957.98
  5. Step 5: Solve for x
    x = 1,056,957.98/878.56
  6. Step 6: Final answer
    x = 1,203.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.