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Finding the Fourth Proportional to 692.64, 955.85 and 412.92

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Solution

The fourth proportional to 692.64, 955.85 and 412.92 is: 569.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.64 : 955.85 = 412.92 : x
  2. Step 2: Convert to fraction form
    692.64/955.85 = 412.92/x
  3. Step 3: Cross multiply
    692.64x = 955.85 × 412.92
  4. Step 4: Simplify right side
    692.64x = 394,687.52
  5. Step 5: Solve for x
    x = 394,687.52/692.64
  6. Step 6: Final answer
    x = 569.83

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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.