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Finding the Fourth Proportional to 855.05, 1,281.17 and 673.25

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Solution

The fourth proportional to 855.05, 1,281.17 and 673.25 is: 1,008.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.05 : 1,281.17 = 673.25 : x
  2. Step 2: Convert to fraction form
    855.05/1,281.17 = 673.25/x
  3. Step 3: Cross multiply
    855.05x = 1,281.17 × 673.25
  4. Step 4: Simplify right side
    855.05x = 862,537.93
  5. Step 5: Solve for x
    x = 862,537.93/855.05
  6. Step 6: Final answer
    x = 1,008.76

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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.