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Finding the Fourth Proportional to 699,042.90, 964,669.99 and 393,119.19

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Solution

The fourth proportional to 699,042.90, 964,669.99 and 393,119.19 is: 542,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,042.90 : 964,669.99 = 393,119.19 : x
  2. Step 2: Convert to fraction form
    699,042.90/964,669.99 = 393,119.19/x
  3. Step 3: Cross multiply
    699,042.90x = 964,669.99 × 393,119.19
  4. Step 4: Simplify right side
    699,042.90x = 379,230,285,086.11
  5. Step 5: Solve for x
    x = 379,230,285,086.11/699,042.90
  6. Step 6: Final answer
    x = 542,499.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.