Home / 318,919.20-478,436.40-131,949.60

Finding the Fourth Proportional to 318,919.20, 478,436.40 and 131,949.60

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Solution

The fourth proportional to 318,919.20, 478,436.40 and 131,949.60 is: 197,948.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,919.20 : 478,436.40 = 131,949.60 : x
  2. Step 2: Convert to fraction form
    318,919.20/478,436.40 = 131,949.60/x
  3. Step 3: Cross multiply
    318,919.20x = 478,436.40 × 131,949.60
  4. Step 4: Simplify right side
    318,919.20x = 63,129,491,605.44
  5. Step 5: Solve for x
    x = 63,129,491,605.44/318,919.20
  6. Step 6: Final answer
    x = 197,948.23

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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.