Home / 642,111.20-963,166.80-327,183.20

Finding the Fourth Proportional to 642,111.20, 963,166.80 and 327,183.20

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Solution

The fourth proportional to 642,111.20, 963,166.80 and 327,183.20 is: 490,774.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,111.20 : 963,166.80 = 327,183.20 : x
  2. Step 2: Convert to fraction form
    642,111.20/963,166.80 = 327,183.20/x
  3. Step 3: Cross multiply
    642,111.20x = 963,166.80 × 327,183.20
  4. Step 4: Simplify right side
    642,111.20x = 315,131,995,757.76
  5. Step 5: Solve for x
    x = 315,131,995,757.76/642,111.20
  6. Step 6: Final answer
    x = 490,774.80

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Similar ratio
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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.