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Finding the Fourth Proportional to 888.77, 1,324.42 and 859.41

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Solution

The fourth proportional to 888.77, 1,324.42 and 859.41 is: 1,280.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.77 : 1,324.42 = 859.41 : x
  2. Step 2: Convert to fraction form
    888.77/1,324.42 = 859.41/x
  3. Step 3: Cross multiply
    888.77x = 1,324.42 × 859.41
  4. Step 4: Simplify right side
    888.77x = 1,138,217.64
  5. Step 5: Solve for x
    x = 1,138,217.64/888.77
  6. Step 6: Final answer
    x = 1,280.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.