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Finding the Fourth Proportional to 641,954.82, 885,897.45 and 355,474.83

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Solution

The fourth proportional to 641,954.82, 885,897.45 and 355,474.83 is: 490,555.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,954.82 : 885,897.45 = 355,474.83 : x
  2. Step 2: Convert to fraction form
    641,954.82/885,897.45 = 355,474.83/x
  3. Step 3: Cross multiply
    641,954.82x = 885,897.45 × 355,474.83
  4. Step 4: Simplify right side
    641,954.82x = 314,914,245,436.18
  5. Step 5: Solve for x
    x = 314,914,245,436.18/641,954.82
  6. Step 6: Final answer
    x = 490,555.15

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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.