Home / 1,425,728.20-2,136,000.30-1,128,166.60

Finding the Fourth Proportional to 1,425,728.20, 2,136,000.30 and 1,128,166.60

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Solution

The fourth proportional to 1,425,728.20, 2,136,000.30 and 1,128,166.60 is: 1,690,198.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,728.20 : 2,136,000.30 = 1,128,166.60 : x
  2. Step 2: Convert to fraction form
    1,425,728.20/2,136,000.30 = 1,128,166.60/x
  3. Step 3: Cross multiply
    1,425,728.20x = 2,136,000.30 × 1,128,166.60
  4. Step 4: Simplify right side
    1,425,728.20x = 2,409,764,196,049.98
  5. Step 5: Solve for x
    x = 2,409,764,196,049.98/1,425,728.20
  6. Step 6: Final answer
    x = 1,690,198.87

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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.