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Finding the Fourth Proportional to 692.97, 956.37 and 398.26

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Solution

The fourth proportional to 692.97, 956.37 and 398.26 is: 549.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.97 : 956.37 = 398.26 : x
  2. Step 2: Convert to fraction form
    692.97/956.37 = 398.26/x
  3. Step 3: Cross multiply
    692.97x = 956.37 × 398.26
  4. Step 4: Simplify right side
    692.97x = 380,883.92
  5. Step 5: Solve for x
    x = 380,883.92/692.97
  6. Step 6: Final answer
    x = 549.64

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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.