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Finding the Fourth Proportional to 518,363.78, 777,012.48 and 198,440.30

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Solution

The fourth proportional to 518,363.78, 777,012.48 and 198,440.30 is: 297,456.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,363.78 : 777,012.48 = 198,440.30 : x
  2. Step 2: Convert to fraction form
    518,363.78/777,012.48 = 198,440.30/x
  3. Step 3: Cross multiply
    518,363.78x = 777,012.48 × 198,440.30
  4. Step 4: Simplify right side
    518,363.78x = 154,190,591,577.48
  5. Step 5: Solve for x
    x = 154,190,591,577.48/518,363.78
  6. Step 6: Final answer
    x = 297,456.34

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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.