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Finding the Fourth Proportional to 881.36, 1,318.80 and 516.32

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Solution

The fourth proportional to 881.36, 1,318.80 and 516.32 is: 772.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.36 : 1,318.80 = 516.32 : x
  2. Step 2: Convert to fraction form
    881.36/1,318.80 = 516.32/x
  3. Step 3: Cross multiply
    881.36x = 1,318.80 × 516.32
  4. Step 4: Simplify right side
    881.36x = 680,922.82
  5. Step 5: Solve for x
    x = 680,922.82/881.36
  6. Step 6: Final answer
    x = 772.58

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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.