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Finding the Fourth Proportional to 275,857.88, 380,695.05 and 154,998.78

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Solution

The fourth proportional to 275,857.88, 380,695.05 and 154,998.78 is: 213,904.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,857.88 : 380,695.05 = 154,998.78 : x
  2. Step 2: Convert to fraction form
    275,857.88/380,695.05 = 154,998.78/x
  3. Step 3: Cross multiply
    275,857.88x = 380,695.05 × 154,998.78
  4. Step 4: Simplify right side
    275,857.88x = 59,007,268,302.04
  5. Step 5: Solve for x
    x = 59,007,268,302.04/275,857.88
  6. Step 6: Final answer
    x = 213,904.60

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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.