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Finding the Fourth Proportional to 686,800.26, 947,757.96 and 380,889.18

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Solution

The fourth proportional to 686,800.26, 947,757.96 and 380,889.18 is: 525,612.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,800.26 : 947,757.96 = 380,889.18 : x
  2. Step 2: Convert to fraction form
    686,800.26/947,757.96 = 380,889.18/x
  3. Step 3: Cross multiply
    686,800.26x = 947,757.96 × 380,889.18
  4. Step 4: Simplify right side
    686,800.26x = 360,990,752,222.87
  5. Step 5: Solve for x
    x = 360,990,752,222.87/686,800.26
  6. Step 6: Final answer
    x = 525,612.43

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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.