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Finding the Fourth Proportional to 884.73, 1,318.43 and 855.35

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Solution

The fourth proportional to 884.73, 1,318.43 and 855.35 is: 1,274.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.73 : 1,318.43 = 855.35 : x
  2. Step 2: Convert to fraction form
    884.73/1,318.43 = 855.35/x
  3. Step 3: Cross multiply
    884.73x = 1,318.43 × 855.35
  4. Step 4: Simplify right side
    884.73x = 1,127,708.23
  5. Step 5: Solve for x
    x = 1,127,708.23/884.73
  6. Step 6: Final answer
    x = 1,274.64

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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.