Home / 990,105.40-1,485,012.30-280,205.20

Finding the Fourth Proportional to 990,105.40, 1,485,012.30 and 280,205.20

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Solution

The fourth proportional to 990,105.40, 1,485,012.30 and 280,205.20 is: 420,266.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,105.40 : 1,485,012.30 = 280,205.20 : x
  2. Step 2: Convert to fraction form
    990,105.40/1,485,012.30 = 280,205.20/x
  3. Step 3: Cross multiply
    990,105.40x = 1,485,012.30 × 280,205.20
  4. Step 4: Simplify right side
    990,105.40x = 416,108,168,523.96
  5. Step 5: Solve for x
    x = 416,108,168,523.96/990,105.40
  6. Step 6: Final answer
    x = 420,266.54

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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.