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Finding the Fourth Proportional to 881.20, 1,216.65 and 807.22

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Solution

The fourth proportional to 881.20, 1,216.65 and 807.22 is: 1,114.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.20 : 1,216.65 = 807.22 : x
  2. Step 2: Convert to fraction form
    881.20/1,216.65 = 807.22/x
  3. Step 3: Cross multiply
    881.20x = 1,216.65 × 807.22
  4. Step 4: Simplify right side
    881.20x = 982,104.21
  5. Step 5: Solve for x
    x = 982,104.21/881.20
  6. Step 6: Final answer
    x = 1,114.51

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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.