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Finding the Fourth Proportional to 983.62, 1,357.22 and 722.26

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Solution

The fourth proportional to 983.62, 1,357.22 and 722.26 is: 996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.62 : 1,357.22 = 722.26 : x
  2. Step 2: Convert to fraction form
    983.62/1,357.22 = 722.26/x
  3. Step 3: Cross multiply
    983.62x = 1,357.22 × 722.26
  4. Step 4: Simplify right side
    983.62x = 980,265.72
  5. Step 5: Solve for x
    x = 980,265.72/983.62
  6. Step 6: Final answer
    x = 996.59

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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.