Home / 1,280,508.90-1,920,910.97-427,693.71

Finding the Fourth Proportional to 1,280,508.90, 1,920,910.97 and 427,693.71

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Solution

The fourth proportional to 1,280,508.90, 1,920,910.97 and 427,693.71 is: 641,589.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,508.90 : 1,920,910.97 = 427,693.71 : x
  2. Step 2: Convert to fraction form
    1,280,508.90/1,920,910.97 = 427,693.71/x
  3. Step 3: Cross multiply
    1,280,508.90x = 1,920,910.97 × 427,693.71
  4. Step 4: Simplify right side
    1,280,508.90x = 821,561,539,339.00
  5. Step 5: Solve for x
    x = 821,561,539,339.00/1,280,508.90
  6. Step 6: Final answer
    x = 641,589.87

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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.