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Finding the Fourth Proportional to 1,409,968.71, 1,945,759.31 and 765,389.34

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Solution

The fourth proportional to 1,409,968.71, 1,945,759.31 and 765,389.34 is: 1,056,238.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409,968.71 : 1,945,759.31 = 765,389.34 : x
  2. Step 2: Convert to fraction form
    1,409,968.71/1,945,759.31 = 765,389.34/x
  3. Step 3: Cross multiply
    1,409,968.71x = 1,945,759.31 × 765,389.34
  4. Step 4: Simplify right side
    1,409,968.71x = 1,489,263,430,252.81
  5. Step 5: Solve for x
    x = 1,489,263,430,252.81/1,409,968.71
  6. Step 6: Final answer
    x = 1,056,238.64

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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.