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Finding the Fourth Proportional to 686,360.28, 947,212.14 and 395,863.81

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Solution

The fourth proportional to 686,360.28, 947,212.14 and 395,863.81 is: 546,312.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,360.28 : 947,212.14 = 395,863.81 : x
  2. Step 2: Convert to fraction form
    686,360.28/947,212.14 = 395,863.81/x
  3. Step 3: Cross multiply
    686,360.28x = 947,212.14 × 395,863.81
  4. Step 4: Simplify right side
    686,360.28x = 374,967,006,618.65
  5. Step 5: Solve for x
    x = 374,967,006,618.65/686,360.28
  6. Step 6: Final answer
    x = 546,312.22

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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.