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Finding the Fourth Proportional to 888.80, 1,333.80 and 851.13

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Solution

The fourth proportional to 888.80, 1,333.80 and 851.13 is: 1,277.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.80 : 1,333.80 = 851.13 : x
  2. Step 2: Convert to fraction form
    888.80/1,333.80 = 851.13/x
  3. Step 3: Cross multiply
    888.80x = 1,333.80 × 851.13
  4. Step 4: Simplify right side
    888.80x = 1,135,237.19
  5. Step 5: Solve for x
    x = 1,135,237.19/888.80
  6. Step 6: Final answer
    x = 1,277.28

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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.