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Finding the Fourth Proportional to 733.44, 1,009.76 and 622.64

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Solution

The fourth proportional to 733.44, 1,009.76 and 622.64 is: 857.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.44 : 1,009.76 = 622.64 : x
  2. Step 2: Convert to fraction form
    733.44/1,009.76 = 622.64/x
  3. Step 3: Cross multiply
    733.44x = 1,009.76 × 622.64
  4. Step 4: Simplify right side
    733.44x = 628,716.97
  5. Step 5: Solve for x
    x = 628,716.97/733.44
  6. Step 6: Final answer
    x = 857.22

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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.