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Finding the Fourth Proportional to 692.43, 955.52 and 397.70

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Solution

The fourth proportional to 692.43, 955.52 and 397.70 is: 548.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.43 : 955.52 = 397.70 : x
  2. Step 2: Convert to fraction form
    692.43/955.52 = 397.70/x
  3. Step 3: Cross multiply
    692.43x = 955.52 × 397.70
  4. Step 4: Simplify right side
    692.43x = 380,008.73
  5. Step 5: Solve for x
    x = 380,008.73/692.43
  6. Step 6: Final answer
    x = 548.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.