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Finding the Fourth Proportional to 641,954.43, 885,896.56 and 355,474.51

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Solution

The fourth proportional to 641,954.43, 885,896.56 and 355,474.51 is: 490,554.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,954.43 : 885,896.56 = 355,474.51 : x
  2. Step 2: Convert to fraction form
    641,954.43/885,896.56 = 355,474.51/x
  3. Step 3: Cross multiply
    641,954.43x = 885,896.56 × 355,474.51
  4. Step 4: Simplify right side
    641,954.43x = 314,913,643,806.29
  5. Step 5: Solve for x
    x = 314,913,643,806.29/641,954.43
  6. Step 6: Final answer
    x = 490,554.51

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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.