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Finding the Fourth Proportional to 692.42, 955.41 and 426.61

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Solution

The fourth proportional to 692.42, 955.41 and 426.61 is: 588.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.42 : 955.41 = 426.61 : x
  2. Step 2: Convert to fraction form
    692.42/955.41 = 426.61/x
  3. Step 3: Cross multiply
    692.42x = 955.41 × 426.61
  4. Step 4: Simplify right side
    692.42x = 407,582.68
  5. Step 5: Solve for x
    x = 407,582.68/692.42
  6. Step 6: Final answer
    x = 588.64

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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.