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Finding the Fourth Proportional to 1,913,232.55, 2,640,447.54 and 1,428,957.31

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Solution

The fourth proportional to 1,913,232.55, 2,640,447.54 and 1,428,957.31 is: 1,972,100.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913,232.55 : 2,640,447.54 = 1,428,957.31 : x
  2. Step 2: Convert to fraction form
    1,913,232.55/2,640,447.54 = 1,428,957.31/x
  3. Step 3: Cross multiply
    1,913,232.55x = 2,640,447.54 × 1,428,957.31
  4. Step 4: Simplify right side
    1,913,232.55x = 3,773,086,813,954.52
  5. Step 5: Solve for x
    x = 3,773,086,813,954.52/1,913,232.55
  6. Step 6: Final answer
    x = 1,972,100.47

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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.