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Finding the Fourth Proportional to 697.98, 963.36 and 403.21

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Solution

The fourth proportional to 697.98, 963.36 and 403.21 is: 556.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.98 : 963.36 = 403.21 : x
  2. Step 2: Convert to fraction form
    697.98/963.36 = 403.21/x
  3. Step 3: Cross multiply
    697.98x = 963.36 × 403.21
  4. Step 4: Simplify right side
    697.98x = 388,437.59
  5. Step 5: Solve for x
    x = 388,437.59/697.98
  6. Step 6: Final answer
    x = 556.51

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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.