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Finding the Fourth Proportional to 665,220.40, 997,830.60 and 191,921.20

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Solution

The fourth proportional to 665,220.40, 997,830.60 and 191,921.20 is: 287,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,220.40 : 997,830.60 = 191,921.20 : x
  2. Step 2: Convert to fraction form
    665,220.40/997,830.60 = 191,921.20/x
  3. Step 3: Cross multiply
    665,220.40x = 997,830.60 × 191,921.20
  4. Step 4: Simplify right side
    665,220.40x = 191,504,846,148.72
  5. Step 5: Solve for x
    x = 191,504,846,148.72/665,220.40
  6. Step 6: Final answer
    x = 287,881.80

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Similar ratio
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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.