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Finding the Fourth Proportional to 692.44, 955.78 and 412.88

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Solution

The fourth proportional to 692.44, 955.78 and 412.88 is: 569.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.44 : 955.78 = 412.88 : x
  2. Step 2: Convert to fraction form
    692.44/955.78 = 412.88/x
  3. Step 3: Cross multiply
    692.44x = 955.78 × 412.88
  4. Step 4: Simplify right side
    692.44x = 394,622.45
  5. Step 5: Solve for x
    x = 394,622.45/692.44
  6. Step 6: Final answer
    x = 569.90

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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.