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Finding the Fourth Proportional to 1,387,341.22, 1,914,839.70 and 843,361.88

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Solution

The fourth proportional to 1,387,341.22, 1,914,839.70 and 843,361.88 is: 1,164,027.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,341.22 : 1,914,839.70 = 843,361.88 : x
  2. Step 2: Convert to fraction form
    1,387,341.22/1,914,839.70 = 843,361.88/x
  3. Step 3: Cross multiply
    1,387,341.22x = 1,914,839.70 × 843,361.88
  4. Step 4: Simplify right side
    1,387,341.22x = 1,614,902,796,553.83
  5. Step 5: Solve for x
    x = 1,614,902,796,553.83/1,387,341.22
  6. Step 6: Final answer
    x = 1,164,027.11

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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.