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Finding the Fourth Proportional to 686,367.72, 947,185.81 and 376,269.75

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Solution

The fourth proportional to 686,367.72, 947,185.81 and 376,269.75 is: 519,251.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,367.72 : 947,185.81 = 376,269.75 : x
  2. Step 2: Convert to fraction form
    686,367.72/947,185.81 = 376,269.75/x
  3. Step 3: Cross multiply
    686,367.72x = 947,185.81 × 376,269.75
  4. Step 4: Simplify right side
    686,367.72x = 356,397,366,050.90
  5. Step 5: Solve for x
    x = 356,397,366,050.90/686,367.72
  6. Step 6: Final answer
    x = 519,251.36

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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.