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Finding the Fourth Proportional to 371,979, 557,968.77 and 122,661

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Solution

The fourth proportional to 371,979, 557,968.77 and 122,661 is: 183,991.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,979 : 557,968.77 = 122,661 : x
  2. Step 2: Convert to fraction form
    371,979/557,968.77 = 122,661/x
  3. Step 3: Cross multiply
    371,979x = 557,968.77 × 122,661
  4. Step 4: Simplify right side
    371,979x = 68,441,007,296.97
  5. Step 5: Solve for x
    x = 68,441,007,296.97/371,979
  6. Step 6: Final answer
    x = 183,991.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.