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Finding the Fourth Proportional to 641,954.70, 885,897.42 and 355,474.81

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Solution

The fourth proportional to 641,954.70, 885,897.42 and 355,474.81 is: 490,555.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,954.70 : 885,897.42 = 355,474.81 : x
  2. Step 2: Convert to fraction form
    641,954.70/885,897.42 = 355,474.81/x
  3. Step 3: Cross multiply
    641,954.70x = 885,897.42 × 355,474.81
  4. Step 4: Simplify right side
    641,954.70x = 314,914,217,053.99
  5. Step 5: Solve for x
    x = 314,914,217,053.99/641,954.70
  6. Step 6: Final answer
    x = 490,555.21

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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.