Home / 1,245,273.20-1,867,909.80-820,120.40

Finding the Fourth Proportional to 1,245,273.20, 1,867,909.80 and 820,120.40

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Solution

The fourth proportional to 1,245,273.20, 1,867,909.80 and 820,120.40 is: 1,230,180.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,273.20 : 1,867,909.80 = 820,120.40 : x
  2. Step 2: Convert to fraction form
    1,245,273.20/1,867,909.80 = 820,120.40/x
  3. Step 3: Cross multiply
    1,245,273.20x = 1,867,909.80 × 820,120.40
  4. Step 4: Simplify right side
    1,245,273.20x = 1,531,910,932,339.92
  5. Step 5: Solve for x
    x = 1,531,910,932,339.92/1,245,273.20
  6. Step 6: Final answer
    x = 1,230,180.60

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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.