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Finding the Fourth Proportional to 318,427.20, 477,640.80 and 206,234.10

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Solution

The fourth proportional to 318,427.20, 477,640.80 and 206,234.10 is: 309,351.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,427.20 : 477,640.80 = 206,234.10 : x
  2. Step 2: Convert to fraction form
    318,427.20/477,640.80 = 206,234.10/x
  3. Step 3: Cross multiply
    318,427.20x = 477,640.80 × 206,234.10
  4. Step 4: Simplify right side
    318,427.20x = 98,505,820,511.28
  5. Step 5: Solve for x
    x = 98,505,820,511.28/318,427.20
  6. Step 6: Final answer
    x = 309,351.15

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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.