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Finding the Fourth Proportional to 686,367.21, 947,185.12 and 376,269.25

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Solution

The fourth proportional to 686,367.21, 947,185.12 and 376,269.25 is: 519,250.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,367.21 : 947,185.12 = 376,269.25 : x
  2. Step 2: Convert to fraction form
    686,367.21/947,185.12 = 376,269.25/x
  3. Step 3: Cross multiply
    686,367.21x = 947,185.12 × 376,269.25
  4. Step 4: Simplify right side
    686,367.21x = 356,396,633,772.89
  5. Step 5: Solve for x
    x = 356,396,633,772.89/686,367.21
  6. Step 6: Final answer
    x = 519,250.67

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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.