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Finding the Fourth Proportional to 445,376.40, 668,064.60 and 419,132.40

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Solution

The fourth proportional to 445,376.40, 668,064.60 and 419,132.40 is: 628,698.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,376.40 : 668,064.60 = 419,132.40 : x
  2. Step 2: Convert to fraction form
    445,376.40/668,064.60 = 419,132.40/x
  3. Step 3: Cross multiply
    445,376.40x = 668,064.60 × 419,132.40
  4. Step 4: Simplify right side
    445,376.40x = 280,007,519,153.04
  5. Step 5: Solve for x
    x = 280,007,519,153.04/445,376.40
  6. Step 6: Final answer
    x = 628,698.60

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Similar ratio
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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.