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Finding the Fourth Proportional to 378,051.63, 521,709.69 and 205,969.11

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Solution

The fourth proportional to 378,051.63, 521,709.69 and 205,969.11 is: 284,236.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,051.63 : 521,709.69 = 205,969.11 : x
  2. Step 2: Convert to fraction form
    378,051.63/521,709.69 = 205,969.11/x
  3. Step 3: Cross multiply
    378,051.63x = 521,709.69 × 205,969.11
  4. Step 4: Simplify right side
    378,051.63x = 107,456,080,527.68
  5. Step 5: Solve for x
    x = 107,456,080,527.68/378,051.63
  6. Step 6: Final answer
    x = 284,236.52

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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.