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Finding the Fourth Proportional to 692.03, 955.13 and 397.49

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Solution

The fourth proportional to 692.03, 955.13 and 397.49 is: 548.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.03 : 955.13 = 397.49 : x
  2. Step 2: Convert to fraction form
    692.03/955.13 = 397.49/x
  3. Step 3: Cross multiply
    692.03x = 955.13 × 397.49
  4. Step 4: Simplify right side
    692.03x = 379,647.86
  5. Step 5: Solve for x
    x = 379,647.86/692.03
  6. Step 6: Final answer
    x = 548.60

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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.