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Finding the Fourth Proportional to 699,842.76, 965,813.64 and 393,938.88

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Solution

The fourth proportional to 699,842.76, 965,813.64 and 393,938.88 is: 543,652.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,842.76 : 965,813.64 = 393,938.88 : x
  2. Step 2: Convert to fraction form
    699,842.76/965,813.64 = 393,938.88/x
  3. Step 3: Cross multiply
    699,842.76x = 965,813.64 × 393,938.88
  4. Step 4: Simplify right side
    699,842.76x = 380,471,543,630.32
  5. Step 5: Solve for x
    x = 380,471,543,630.32/699,842.76
  6. Step 6: Final answer
    x = 543,652.90

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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.