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Finding the Fourth Proportional to 661,243.53, 993,028.20 and 651,777.33

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Solution

The fourth proportional to 661,243.53, 993,028.20 and 651,777.33 is: 978,812.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,243.53 : 993,028.20 = 651,777.33 : x
  2. Step 2: Convert to fraction form
    661,243.53/993,028.20 = 651,777.33/x
  3. Step 3: Cross multiply
    661,243.53x = 993,028.20 × 651,777.33
  4. Step 4: Simplify right side
    661,243.53x = 647,233,268,810.71
  5. Step 5: Solve for x
    x = 647,233,268,810.71/661,243.53
  6. Step 6: Final answer
    x = 978,812.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.