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Finding the Fourth Proportional to 881.02, 1,318.78 and 788.28

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Solution

The fourth proportional to 881.02, 1,318.78 and 788.28 is: 1,179.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.02 : 1,318.78 = 788.28 : x
  2. Step 2: Convert to fraction form
    881.02/1,318.78 = 788.28/x
  3. Step 3: Cross multiply
    881.02x = 1,318.78 × 788.28
  4. Step 4: Simplify right side
    881.02x = 1,039,567.90
  5. Step 5: Solve for x
    x = 1,039,567.90/881.02
  6. Step 6: Final answer
    x = 1,179.96

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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.