Home / 809,136.20-1,213,704.30-509,954.60

Finding the Fourth Proportional to 809,136.20, 1,213,704.30 and 509,954.60

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Solution

The fourth proportional to 809,136.20, 1,213,704.30 and 509,954.60 is: 764,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,136.20 : 1,213,704.30 = 509,954.60 : x
  2. Step 2: Convert to fraction form
    809,136.20/1,213,704.30 = 509,954.60/x
  3. Step 3: Cross multiply
    809,136.20x = 1,213,704.30 × 509,954.60
  4. Step 4: Simplify right side
    809,136.20x = 618,934,090,824.78
  5. Step 5: Solve for x
    x = 618,934,090,824.78/809,136.20
  6. Step 6: Final answer
    x = 764,931.90

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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.