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Finding the Fourth Proportional to 699,342.50, 965,091.22 and 393,419.10

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Solution

The fourth proportional to 699,342.50, 965,091.22 and 393,419.10 is: 542,917.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,342.50 : 965,091.22 = 393,419.10 : x
  2. Step 2: Convert to fraction form
    699,342.50/965,091.22 = 393,419.10/x
  3. Step 3: Cross multiply
    699,342.50x = 965,091.22 × 393,419.10
  4. Step 4: Simplify right side
    699,342.50x = 379,685,319,190.30
  5. Step 5: Solve for x
    x = 379,685,319,190.30/699,342.50
  6. Step 6: Final answer
    x = 542,917.55

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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.