Home / 811,896.20-1,217,921.10-220,920.20

Finding the Fourth Proportional to 811,896.20, 1,217,921.10 and 220,920.20

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Solution

The fourth proportional to 811,896.20, 1,217,921.10 and 220,920.20 is: 331,401.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,896.20 : 1,217,921.10 = 220,920.20 : x
  2. Step 2: Convert to fraction form
    811,896.20/1,217,921.10 = 220,920.20/x
  3. Step 3: Cross multiply
    811,896.20x = 1,217,921.10 × 220,920.20
  4. Step 4: Simplify right side
    811,896.20x = 269,063,372,996.22
  5. Step 5: Solve for x
    x = 269,063,372,996.22/811,896.20
  6. Step 6: Final answer
    x = 331,401.20

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Double scale
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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.