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Finding the Fourth Proportional to 686,800.92, 947,815.92 and 380,856.72

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Solution

The fourth proportional to 686,800.92, 947,815.92 and 380,856.72 is: 525,599.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,800.92 : 947,815.92 = 380,856.72 : x
  2. Step 2: Convert to fraction form
    686,800.92/947,815.92 = 380,856.72/x
  3. Step 3: Cross multiply
    686,800.92x = 947,815.92 × 380,856.72
  4. Step 4: Simplify right side
    686,800.92x = 360,982,062,454.98
  5. Step 5: Solve for x
    x = 360,982,062,454.98/686,800.92
  6. Step 6: Final answer
    x = 525,599.27

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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.