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Finding the Fourth Proportional to 722.33, 996.81 and 403.30

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Solution

The fourth proportional to 722.33, 996.81 and 403.30 is: 556.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.33 : 996.81 = 403.30 : x
  2. Step 2: Convert to fraction form
    722.33/996.81 = 403.30/x
  3. Step 3: Cross multiply
    722.33x = 996.81 × 403.30
  4. Step 4: Simplify right side
    722.33x = 402,008.49
  5. Step 5: Solve for x
    x = 402,008.49/722.33
  6. Step 6: Final answer
    x = 556.55

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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.