Home / 642,128.20-963,192.30-327,200.20

Finding the Fourth Proportional to 642,128.20, 963,192.30 and 327,200.20

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Solution

The fourth proportional to 642,128.20, 963,192.30 and 327,200.20 is: 490,800.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,128.20 : 963,192.30 = 327,200.20 : x
  2. Step 2: Convert to fraction form
    642,128.20/963,192.30 = 327,200.20/x
  3. Step 3: Cross multiply
    642,128.20x = 963,192.30 × 327,200.20
  4. Step 4: Simplify right side
    642,128.20x = 315,156,713,198.46
  5. Step 5: Solve for x
    x = 315,156,713,198.46/642,128.20
  6. Step 6: Final answer
    x = 490,800.30

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Half scale
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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.