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Finding the Fourth Proportional to 1,393,517.52, 1,923,083.10 and 789,905.52

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Solution

The fourth proportional to 1,393,517.52, 1,923,083.10 and 789,905.52 is: 1,090,086.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,517.52 : 1,923,083.10 = 789,905.52 : x
  2. Step 2: Convert to fraction form
    1,393,517.52/1,923,083.10 = 789,905.52/x
  3. Step 3: Cross multiply
    1,393,517.52x = 1,923,083.10 × 789,905.52
  4. Step 4: Simplify right side
    1,393,517.52x = 1,519,053,956,108.71
  5. Step 5: Solve for x
    x = 1,519,053,956,108.71/1,393,517.52
  6. Step 6: Final answer
    x = 1,090,086.01

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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.