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Finding the Fourth Proportional to 259,963.80, 389,945.70 and 183,856.20

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Solution

The fourth proportional to 259,963.80, 389,945.70 and 183,856.20 is: 275,784.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,963.80 : 389,945.70 = 183,856.20 : x
  2. Step 2: Convert to fraction form
    259,963.80/389,945.70 = 183,856.20/x
  3. Step 3: Cross multiply
    259,963.80x = 389,945.70 × 183,856.20
  4. Step 4: Simplify right side
    259,963.80x = 71,693,934,608.34
  5. Step 5: Solve for x
    x = 71,693,934,608.34/259,963.80
  6. Step 6: Final answer
    x = 275,784.30

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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.