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Finding the Fourth Proportional to 691,720.51, 954,411.78 and 419,782.33

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Solution

The fourth proportional to 691,720.51, 954,411.78 and 419,782.33 is: 579,200.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,720.51 : 954,411.78 = 419,782.33 : x
  2. Step 2: Convert to fraction form
    691,720.51/954,411.78 = 419,782.33/x
  3. Step 3: Cross multiply
    691,720.51x = 954,411.78 × 419,782.33
  4. Step 4: Simplify right side
    691,720.51x = 400,645,200,787.85
  5. Step 5: Solve for x
    x = 400,645,200,787.85/691,720.51
  6. Step 6: Final answer
    x = 579,200.99

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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.