Home / 812,104.20-1,218,233.10-221,128.20

Finding the Fourth Proportional to 812,104.20, 1,218,233.10 and 221,128.20

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Solution

The fourth proportional to 812,104.20, 1,218,233.10 and 221,128.20 is: 331,713.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,104.20 : 1,218,233.10 = 221,128.20 : x
  2. Step 2: Convert to fraction form
    812,104.20/1,218,233.10 = 221,128.20/x
  3. Step 3: Cross multiply
    812,104.20x = 1,218,233.10 × 221,128.20
  4. Step 4: Simplify right side
    812,104.20x = 269,385,692,583.42
  5. Step 5: Solve for x
    x = 269,385,692,583.42/812,104.20
  6. Step 6: Final answer
    x = 331,713.21

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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.