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Finding the Fourth Proportional to 881.34, 1,322.00 and 518.43

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Solution

The fourth proportional to 881.34, 1,322.00 and 518.43 is: 777.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.34 : 1,322.00 = 518.43 : x
  2. Step 2: Convert to fraction form
    881.34/1,322.00 = 518.43/x
  3. Step 3: Cross multiply
    881.34x = 1,322.00 × 518.43
  4. Step 4: Simplify right side
    881.34x = 685,361.87
  5. Step 5: Solve for x
    x = 685,361.87/881.34
  6. Step 6: Final answer
    x = 777.64

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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.