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Finding the Fourth Proportional to 1,389,740.22, 1,917,568.80 and 873,194.82

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Solution

The fourth proportional to 1,389,740.22, 1,917,568.80 and 873,194.82 is: 1,204,837.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,740.22 : 1,917,568.80 = 873,194.82 : x
  2. Step 2: Convert to fraction form
    1,389,740.22/1,917,568.80 = 873,194.82/x
  3. Step 3: Cross multiply
    1,389,740.22x = 1,917,568.80 × 873,194.82
  4. Step 4: Simplify right side
    1,389,740.22x = 1,674,411,143,153.62
  5. Step 5: Solve for x
    x = 1,674,411,143,153.62/1,389,740.22
  6. Step 6: Final answer
    x = 1,204,837.51

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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.