Home / 1,330,496.20-1,995,890.10-1,288,505.80

Finding the Fourth Proportional to 1,330,496.20, 1,995,890.10 and 1,288,505.80

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Solution

The fourth proportional to 1,330,496.20, 1,995,890.10 and 1,288,505.80 is: 1,932,899.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,496.20 : 1,995,890.10 = 1,288,505.80 : x
  2. Step 2: Convert to fraction form
    1,330,496.20/1,995,890.10 = 1,288,505.80/x
  3. Step 3: Cross multiply
    1,330,496.20x = 1,995,890.10 × 1,288,505.80
  4. Step 4: Simplify right side
    1,330,496.20x = 2,571,715,970,012.58
  5. Step 5: Solve for x
    x = 2,571,715,970,012.58/1,330,496.20
  6. Step 6: Final answer
    x = 1,932,899.90

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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.