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Finding the Fourth Proportional to 855.02, 1,281.33 and 682.22

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Solution

The fourth proportional to 855.02, 1,281.33 and 682.22 is: 1,022.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.02 : 1,281.33 = 682.22 : x
  2. Step 2: Convert to fraction form
    855.02/1,281.33 = 682.22/x
  3. Step 3: Cross multiply
    855.02x = 1,281.33 × 682.22
  4. Step 4: Simplify right side
    855.02x = 874,153.12
  5. Step 5: Solve for x
    x = 874,153.12/855.02
  6. Step 6: Final answer
    x = 1,022.38

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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.