Home / 812,085.20-1,218,204.60-221,109.20

Finding the Fourth Proportional to 812,085.20, 1,218,204.60 and 221,109.20

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Solution

The fourth proportional to 812,085.20, 1,218,204.60 and 221,109.20 is: 331,684.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,085.20 : 1,218,204.60 = 221,109.20 : x
  2. Step 2: Convert to fraction form
    812,085.20/1,218,204.60 = 221,109.20/x
  3. Step 3: Cross multiply
    812,085.20x = 1,218,204.60 × 221,109.20
  4. Step 4: Simplify right side
    812,085.20x = 269,356,244,542.32
  5. Step 5: Solve for x
    x = 269,356,244,542.32/812,085.20
  6. Step 6: Final answer
    x = 331,684.71

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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.