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Finding the Fourth Proportional to 881.85, 1,216.87 and 788.29

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Solution

The fourth proportional to 881.85, 1,216.87 and 788.29 is: 1,087.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.85 : 1,216.87 = 788.29 : x
  2. Step 2: Convert to fraction form
    881.85/1,216.87 = 788.29/x
  3. Step 3: Cross multiply
    881.85x = 1,216.87 × 788.29
  4. Step 4: Simplify right side
    881.85x = 959,246.45
  5. Step 5: Solve for x
    x = 959,246.45/881.85
  6. Step 6: Final answer
    x = 1,087.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.