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Finding the Fourth Proportional to 888.80, 1,330.77 and 455.09

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Solution

The fourth proportional to 888.80, 1,330.77 and 455.09 is: 681.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.80 : 1,330.77 = 455.09 : x
  2. Step 2: Convert to fraction form
    888.80/1,330.77 = 455.09/x
  3. Step 3: Cross multiply
    888.80x = 1,330.77 × 455.09
  4. Step 4: Simplify right side
    888.80x = 605,620.12
  5. Step 5: Solve for x
    x = 605,620.12/888.80
  6. Step 6: Final answer
    x = 681.39

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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.