Home / 1,121,540.60-1,682,310.90-820,390.70

Finding the Fourth Proportional to 1,121,540.60, 1,682,310.90 and 820,390.70

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Solution

The fourth proportional to 1,121,540.60, 1,682,310.90 and 820,390.70 is: 1,230,586.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,540.60 : 1,682,310.90 = 820,390.70 : x
  2. Step 2: Convert to fraction form
    1,121,540.60/1,682,310.90 = 820,390.70/x
  3. Step 3: Cross multiply
    1,121,540.60x = 1,682,310.90 × 820,390.70
  4. Step 4: Simplify right side
    1,121,540.60x = 1,380,152,216,868.63
  5. Step 5: Solve for x
    x = 1,380,152,216,868.63/1,121,540.60
  6. Step 6: Final answer
    x = 1,230,586.05

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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.