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Finding the Fourth Proportional to 451,615.80, 677,423.70 and 378,132.60

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Solution

The fourth proportional to 451,615.80, 677,423.70 and 378,132.60 is: 567,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,615.80 : 677,423.70 = 378,132.60 : x
  2. Step 2: Convert to fraction form
    451,615.80/677,423.70 = 378,132.60/x
  3. Step 3: Cross multiply
    451,615.80x = 677,423.70 × 378,132.60
  4. Step 4: Simplify right side
    451,615.80x = 256,155,984,982.62
  5. Step 5: Solve for x
    x = 256,155,984,982.62/451,615.80
  6. Step 6: Final answer
    x = 567,198.90

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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.