Home / 642,127.20-963,190.80-327,199.20

Finding the Fourth Proportional to 642,127.20, 963,190.80 and 327,199.20

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Solution

The fourth proportional to 642,127.20, 963,190.80 and 327,199.20 is: 490,798.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,127.20 : 963,190.80 = 327,199.20 : x
  2. Step 2: Convert to fraction form
    642,127.20/963,190.80 = 327,199.20/x
  3. Step 3: Cross multiply
    642,127.20x = 963,190.80 × 327,199.20
  4. Step 4: Simplify right side
    642,127.20x = 315,155,259,207.36
  5. Step 5: Solve for x
    x = 315,155,259,207.36/642,127.20
  6. Step 6: Final answer
    x = 490,798.80

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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.