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Finding the Fourth Proportional to 612,601.70, 918,902.55 and 443,327.90

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Solution

The fourth proportional to 612,601.70, 918,902.55 and 443,327.90 is: 664,991.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,601.70 : 918,902.55 = 443,327.90 : x
  2. Step 2: Convert to fraction form
    612,601.70/918,902.55 = 443,327.90/x
  3. Step 3: Cross multiply
    612,601.70x = 918,902.55 × 443,327.90
  4. Step 4: Simplify right side
    612,601.70x = 407,375,137,796.15
  5. Step 5: Solve for x
    x = 407,375,137,796.15/612,601.70
  6. Step 6: Final answer
    x = 664,991.85

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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.