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Finding the Fourth Proportional to 733.41, 1,011.24 and 639.27

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Solution

The fourth proportional to 733.41, 1,011.24 and 639.27 is: 881.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.41 : 1,011.24 = 639.27 : x
  2. Step 2: Convert to fraction form
    733.41/1,011.24 = 639.27/x
  3. Step 3: Cross multiply
    733.41x = 1,011.24 × 639.27
  4. Step 4: Simplify right side
    733.41x = 646,455.39
  5. Step 5: Solve for x
    x = 646,455.39/733.41
  6. Step 6: Final answer
    x = 881.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.