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Finding the Fourth Proportional to 664,364.20, 996,692.10 and 215,008.60

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Solution

The fourth proportional to 664,364.20, 996,692.10 and 215,008.60 is: 322,560.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,364.20 : 996,692.10 = 215,008.60 : x
  2. Step 2: Convert to fraction form
    664,364.20/996,692.10 = 215,008.60/x
  3. Step 3: Cross multiply
    664,364.20x = 996,692.10 × 215,008.60
  4. Step 4: Simplify right side
    664,364.20x = 214,297,373,052.06
  5. Step 5: Solve for x
    x = 214,297,373,052.06/664,364.20
  6. Step 6: Final answer
    x = 322,560.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.