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Finding the Fourth Proportional to 698.11, 963.47 and 403.38

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Solution

The fourth proportional to 698.11, 963.47 and 403.38 is: 556.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.11 : 963.47 = 403.38 : x
  2. Step 2: Convert to fraction form
    698.11/963.47 = 403.38/x
  3. Step 3: Cross multiply
    698.11x = 963.47 × 403.38
  4. Step 4: Simplify right side
    698.11x = 388,645.54
  5. Step 5: Solve for x
    x = 388,645.54/698.11
  6. Step 6: Final answer
    x = 556.71

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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.