Home / 821,105.80-1,230,621.90-727,793.80

Finding the Fourth Proportional to 821,105.80, 1,230,621.90 and 727,793.80

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Solution

The fourth proportional to 821,105.80, 1,230,621.90 and 727,793.80 is: 1,090,771.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,105.80 : 1,230,621.90 = 727,793.80 : x
  2. Step 2: Convert to fraction form
    821,105.80/1,230,621.90 = 727,793.80/x
  3. Step 3: Cross multiply
    821,105.80x = 1,230,621.90 × 727,793.80
  4. Step 4: Simplify right side
    821,105.80x = 895,638,988,964.22
  5. Step 5: Solve for x
    x = 895,638,988,964.22/821,105.80
  6. Step 6: Final answer
    x = 1,090,771.72

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1.5x scale

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.