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Finding the Fourth Proportional to 681.21, 1,022.02 and 527.31

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Solution

The fourth proportional to 681.21, 1,022.02 and 527.31 is: 791.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.21 : 1,022.02 = 527.31 : x
  2. Step 2: Convert to fraction form
    681.21/1,022.02 = 527.31/x
  3. Step 3: Cross multiply
    681.21x = 1,022.02 × 527.31
  4. Step 4: Simplify right side
    681.21x = 538,920.05
  5. Step 5: Solve for x
    x = 538,920.05/681.21
  6. Step 6: Final answer
    x = 791.12

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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.