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Finding the Fourth Proportional to 678,228.01, 934,664.47 and 665,763.84

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Solution

The fourth proportional to 678,228.01, 934,664.47 and 665,763.84 is: 917,487.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,228.01 : 934,664.47 = 665,763.84 : x
  2. Step 2: Convert to fraction form
    678,228.01/934,664.47 = 665,763.84/x
  3. Step 3: Cross multiply
    678,228.01x = 934,664.47 × 665,763.84
  4. Step 4: Simplify right side
    678,228.01x = 622,265,804,445.73
  5. Step 5: Solve for x
    x = 622,265,804,445.73/678,228.01
  6. Step 6: Final answer
    x = 917,487.62

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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.