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Finding the Fourth Proportional to 686,127.69, 946,843.62 and 380,197.35

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Solution

The fourth proportional to 686,127.69, 946,843.62 and 380,197.35 is: 524,665.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,127.69 : 946,843.62 = 380,197.35 : x
  2. Step 2: Convert to fraction form
    686,127.69/946,843.62 = 380,197.35/x
  3. Step 3: Cross multiply
    686,127.69x = 946,843.62 × 380,197.35
  4. Step 4: Simplify right side
    686,127.69x = 359,987,435,188.41
  5. Step 5: Solve for x
    x = 359,987,435,188.41/686,127.69
  6. Step 6: Final answer
    x = 524,665.37

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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.