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Finding the Fourth Proportional to 666,465.94, 919,067.66 and 611,144.56

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Solution

The fourth proportional to 666,465.94, 919,067.66 and 611,144.56 is: 842,778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,465.94 : 919,067.66 = 611,144.56 : x
  2. Step 2: Convert to fraction form
    666,465.94/919,067.66 = 611,144.56/x
  3. Step 3: Cross multiply
    666,465.94x = 919,067.66 × 611,144.56
  4. Step 4: Simplify right side
    666,465.94x = 561,683,200,680.93
  5. Step 5: Solve for x
    x = 561,683,200,680.93/666,465.94
  6. Step 6: Final answer
    x = 842,778.55

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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.