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Finding the Fourth Proportional to 699,817.20, 965,778.45 and 393,913.32

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Solution

The fourth proportional to 699,817.20, 965,778.45 and 393,913.32 is: 543,617.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,817.20 : 965,778.45 = 393,913.32 : x
  2. Step 2: Convert to fraction form
    699,817.20/965,778.45 = 393,913.32/x
  3. Step 3: Cross multiply
    699,817.20x = 965,778.45 × 393,913.32
  4. Step 4: Simplify right side
    699,817.20x = 380,432,995,623.95
  5. Step 5: Solve for x
    x = 380,432,995,623.95/699,817.20
  6. Step 6: Final answer
    x = 543,617.67

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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.