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Finding the Fourth Proportional to 692.12, 955.52 and 440.38

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Solution

The fourth proportional to 692.12, 955.52 and 440.38 is: 607.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.12 : 955.52 = 440.38 : x
  2. Step 2: Convert to fraction form
    692.12/955.52 = 440.38/x
  3. Step 3: Cross multiply
    692.12x = 955.52 × 440.38
  4. Step 4: Simplify right side
    692.12x = 420,791.90
  5. Step 5: Solve for x
    x = 420,791.90/692.12
  6. Step 6: Final answer
    x = 607.98

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1.5x scale

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.