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Finding the Fourth Proportional to 722.07, 996.52 and 403.09

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Solution

The fourth proportional to 722.07, 996.52 and 403.09 is: 556.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.07 : 996.52 = 403.09 : x
  2. Step 2: Convert to fraction form
    722.07/996.52 = 403.09/x
  3. Step 3: Cross multiply
    722.07x = 996.52 × 403.09
  4. Step 4: Simplify right side
    722.07x = 401,691.49
  5. Step 5: Solve for x
    x = 401,691.49/722.07
  6. Step 6: Final answer
    x = 556.31

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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.