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Finding the Fourth Proportional to 613,366.20, 920,049.30 and 445,404.60

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Solution

The fourth proportional to 613,366.20, 920,049.30 and 445,404.60 is: 668,106.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,366.20 : 920,049.30 = 445,404.60 : x
  2. Step 2: Convert to fraction form
    613,366.20/920,049.30 = 445,404.60/x
  3. Step 3: Cross multiply
    613,366.20x = 920,049.30 × 445,404.60
  4. Step 4: Simplify right side
    613,366.20x = 409,794,190,446.78
  5. Step 5: Solve for x
    x = 409,794,190,446.78/613,366.20
  6. Step 6: Final answer
    x = 668,106.90

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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.