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Finding the Fourth Proportional to 618,971.90, 928,151.60 and 219,552.80

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Solution

The fourth proportional to 618,971.90, 928,151.60 and 219,552.80 is: 329,220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,971.90 : 928,151.60 = 219,552.80 : x
  2. Step 2: Convert to fraction form
    618,971.90/928,151.60 = 219,552.80/x
  3. Step 3: Cross multiply
    618,971.90x = 928,151.60 × 219,552.80
  4. Step 4: Simplify right side
    618,971.90x = 203,778,276,865.96
  5. Step 5: Solve for x
    x = 203,778,276,865.96/618,971.90
  6. Step 6: Final answer
    x = 329,220.56

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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.