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Finding the Fourth Proportional to 630,469.60, 945,704.40 and 394,079.20

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Solution

The fourth proportional to 630,469.60, 945,704.40 and 394,079.20 is: 591,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,469.60 : 945,704.40 = 394,079.20 : x
  2. Step 2: Convert to fraction form
    630,469.60/945,704.40 = 394,079.20/x
  3. Step 3: Cross multiply
    630,469.60x = 945,704.40 × 394,079.20
  4. Step 4: Simplify right side
    630,469.60x = 372,682,433,388.48
  5. Step 5: Solve for x
    x = 372,682,433,388.48/630,469.60
  6. Step 6: Final answer
    x = 591,118.80

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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.