Home / 642,406.20-963,609.30-199,116.60

Finding the Fourth Proportional to 642,406.20, 963,609.30 and 199,116.60

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Solution

The fourth proportional to 642,406.20, 963,609.30 and 199,116.60 is: 298,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,406.20 : 963,609.30 = 199,116.60 : x
  2. Step 2: Convert to fraction form
    642,406.20/963,609.30 = 199,116.60/x
  3. Step 3: Cross multiply
    642,406.20x = 963,609.30 × 199,116.60
  4. Step 4: Simplify right side
    642,406.20x = 191,870,607,544.38
  5. Step 5: Solve for x
    x = 191,870,607,544.38/642,406.20
  6. Step 6: Final answer
    x = 298,674.90

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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.