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Finding the Fourth Proportional to 686,921.03, 948,064.49 and 381,095.93

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Solution

The fourth proportional to 686,921.03, 948,064.49 and 381,095.93 is: 525,975.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,921.03 : 948,064.49 = 381,095.93 : x
  2. Step 2: Convert to fraction form
    686,921.03/948,064.49 = 381,095.93/x
  3. Step 3: Cross multiply
    686,921.03x = 948,064.49 × 381,095.93
  4. Step 4: Simplify right side
    686,921.03x = 361,303,516,611.05
  5. Step 5: Solve for x
    x = 361,303,516,611.05/686,921.03
  6. Step 6: Final answer
    x = 525,975.34

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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.