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Finding the Fourth Proportional to 1,387,676.53, 1,914,887.95 and 843,736.83

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Solution

The fourth proportional to 1,387,676.53, 1,914,887.95 and 843,736.83 is: 1,164,292.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,676.53 : 1,914,887.95 = 843,736.83 : x
  2. Step 2: Convert to fraction form
    1,387,676.53/1,914,887.95 = 843,736.83/x
  3. Step 3: Cross multiply
    1,387,676.53x = 1,914,887.95 × 843,736.83
  4. Step 4: Simplify right side
    1,387,676.53x = 1,615,661,488,738.20
  5. Step 5: Solve for x
    x = 1,615,661,488,738.20/1,387,676.53
  6. Step 6: Final answer
    x = 1,164,292.58

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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.