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Finding the Fourth Proportional to 681.85, 1,022.30 and 357.44

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Solution

The fourth proportional to 681.85, 1,022.30 and 357.44 is: 535.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.85 : 1,022.30 = 357.44 : x
  2. Step 2: Convert to fraction form
    681.85/1,022.30 = 357.44/x
  3. Step 3: Cross multiply
    681.85x = 1,022.30 × 357.44
  4. Step 4: Simplify right side
    681.85x = 365,409.12
  5. Step 5: Solve for x
    x = 365,409.12/681.85
  6. Step 6: Final answer
    x = 535.91

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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.