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Finding the Fourth Proportional to 455,008.60, 682,512.90 and 420,794.20

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Solution

The fourth proportional to 455,008.60, 682,512.90 and 420,794.20 is: 631,191.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,008.60 : 682,512.90 = 420,794.20 : x
  2. Step 2: Convert to fraction form
    455,008.60/682,512.90 = 420,794.20/x
  3. Step 3: Cross multiply
    455,008.60x = 682,512.90 × 420,794.20
  4. Step 4: Simplify right side
    455,008.60x = 287,197,469,745.18
  5. Step 5: Solve for x
    x = 287,197,469,745.18/455,008.60
  6. Step 6: Final answer
    x = 631,191.30

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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.