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Finding the Fourth Proportional to 681.64, 1,022.25 and 356.83

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Solution

The fourth proportional to 681.64, 1,022.25 and 356.83 is: 535.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.64 : 1,022.25 = 356.83 : x
  2. Step 2: Convert to fraction form
    681.64/1,022.25 = 356.83/x
  3. Step 3: Cross multiply
    681.64x = 1,022.25 × 356.83
  4. Step 4: Simplify right side
    681.64x = 364,768.25
  5. Step 5: Solve for x
    x = 364,768.25/681.64
  6. Step 6: Final answer
    x = 535.14

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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.