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Finding the Fourth Proportional to 445,380.40, 668,070.60 and 419,136.40

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Solution

The fourth proportional to 445,380.40, 668,070.60 and 419,136.40 is: 628,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,380.40 : 668,070.60 = 419,136.40 : x
  2. Step 2: Convert to fraction form
    445,380.40/668,070.60 = 419,136.40/x
  3. Step 3: Cross multiply
    445,380.40x = 668,070.60 × 419,136.40
  4. Step 4: Simplify right side
    445,380.40x = 280,012,706,229.84
  5. Step 5: Solve for x
    x = 280,012,706,229.84/445,380.40
  6. Step 6: Final answer
    x = 628,704.60

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1.5x scale

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.