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Finding the Fourth Proportional to 691,760.25, 954,629.15 and 389,954.25

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Solution

The fourth proportional to 691,760.25, 954,629.15 and 389,954.25 is: 538,136.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,760.25 : 954,629.15 = 389,954.25 : x
  2. Step 2: Convert to fraction form
    691,760.25/954,629.15 = 389,954.25/x
  3. Step 3: Cross multiply
    691,760.25x = 954,629.15 × 389,954.25
  4. Step 4: Simplify right side
    691,760.25x = 372,261,692,266.62
  5. Step 5: Solve for x
    x = 372,261,692,266.62/691,760.25
  6. Step 6: Final answer
    x = 538,136.87

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1.5x scale

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.