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Finding the Fourth Proportional to 627,516.06, 865,954.19 and 355,671.81

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Solution

The fourth proportional to 627,516.06, 865,954.19 and 355,671.81 is: 490,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,516.06 : 865,954.19 = 355,671.81 : x
  2. Step 2: Convert to fraction form
    627,516.06/865,954.19 = 355,671.81/x
  3. Step 3: Cross multiply
    627,516.06x = 865,954.19 × 355,671.81
  4. Step 4: Simplify right side
    627,516.06x = 307,995,495,023.56
  5. Step 5: Solve for x
    x = 307,995,495,023.56/627,516.06
  6. Step 6: Final answer
    x = 490,816.91

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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.