Home / 642,109.20-963,163.80-327,181.20

Finding the Fourth Proportional to 642,109.20, 963,163.80 and 327,181.20

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Solution

The fourth proportional to 642,109.20, 963,163.80 and 327,181.20 is: 490,771.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,109.20 : 963,163.80 = 327,181.20 : x
  2. Step 2: Convert to fraction form
    642,109.20/963,163.80 = 327,181.20/x
  3. Step 3: Cross multiply
    642,109.20x = 963,163.80 × 327,181.20
  4. Step 4: Simplify right side
    642,109.20x = 315,129,087,880.56
  5. Step 5: Solve for x
    x = 315,129,087,880.56/642,109.20
  6. Step 6: Final answer
    x = 490,771.80

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Double scale
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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.