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Finding the Fourth Proportional to 1,387,425.44, 1,914,955.98 and 843,446

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Solution

The fourth proportional to 1,387,425.44, 1,914,955.98 and 843,446 is: 1,164,143.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,425.44 : 1,914,955.98 = 843,446 : x
  2. Step 2: Convert to fraction form
    1,387,425.44/1,914,955.98 = 843,446/x
  3. Step 3: Cross multiply
    1,387,425.44x = 1,914,955.98 × 843,446
  4. Step 4: Simplify right side
    1,387,425.44x = 1,615,161,961,507.08
  5. Step 5: Solve for x
    x = 1,615,161,961,507.08/1,387,425.44
  6. Step 6: Final answer
    x = 1,164,143.25

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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.