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Finding the Fourth Proportional to 943.22, 1,404.26 and 938.66

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Solution

The fourth proportional to 943.22, 1,404.26 and 938.66 is: 1,397.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.22 : 1,404.26 = 938.66 : x
  2. Step 2: Convert to fraction form
    943.22/1,404.26 = 938.66/x
  3. Step 3: Cross multiply
    943.22x = 1,404.26 × 938.66
  4. Step 4: Simplify right side
    943.22x = 1,318,122.69
  5. Step 5: Solve for x
    x = 1,318,122.69/943.22
  6. Step 6: Final answer
    x = 1,397.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.