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Finding the Fourth Proportional to 699,845.76, 965,817.78 and 393,941.88

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Solution

The fourth proportional to 699,845.76, 965,817.78 and 393,941.88 is: 543,657.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,845.76 : 965,817.78 = 393,941.88 : x
  2. Step 2: Convert to fraction form
    699,845.76/965,817.78 = 393,941.88/x
  3. Step 3: Cross multiply
    699,845.76x = 965,817.78 × 393,941.88
  4. Step 4: Simplify right side
    699,845.76x = 380,476,071,990.63
  5. Step 5: Solve for x
    x = 380,476,071,990.63/699,845.76
  6. Step 6: Final answer
    x = 543,657.04

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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.