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Finding the Fourth Proportional to 445,530.80, 668,296.20 and 419,286.80

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Solution

The fourth proportional to 445,530.80, 668,296.20 and 419,286.80 is: 628,930.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,530.80 : 668,296.20 = 419,286.80 : x
  2. Step 2: Convert to fraction form
    445,530.80/668,296.20 = 419,286.80/x
  3. Step 3: Cross multiply
    445,530.80x = 668,296.20 × 419,286.80
  4. Step 4: Simplify right side
    445,530.80x = 280,207,775,150.16
  5. Step 5: Solve for x
    x = 280,207,775,150.16/445,530.80
  6. Step 6: Final answer
    x = 628,930.20

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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.