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Finding the Fourth Proportional to 932.26, 1,286.56 and 518.26

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Solution

The fourth proportional to 932.26, 1,286.56 and 518.26 is: 715.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.26 : 1,286.56 = 518.26 : x
  2. Step 2: Convert to fraction form
    932.26/1,286.56 = 518.26/x
  3. Step 3: Cross multiply
    932.26x = 1,286.56 × 518.26
  4. Step 4: Simplify right side
    932.26x = 666,772.59
  5. Step 5: Solve for x
    x = 666,772.59/932.26
  6. Step 6: Final answer
    x = 715.22

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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.