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Finding the Fourth Proportional to 641,954.85, 885,897.05 and 355,474.94

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Solution

The fourth proportional to 641,954.85, 885,897.05 and 355,474.94 is: 490,555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,954.85 : 885,897.05 = 355,474.94 : x
  2. Step 2: Convert to fraction form
    641,954.85/885,897.05 = 355,474.94/x
  3. Step 3: Cross multiply
    641,954.85x = 885,897.05 × 355,474.94
  4. Step 4: Simplify right side
    641,954.85x = 314,914,194,488.07
  5. Step 5: Solve for x
    x = 314,914,194,488.07/641,954.85
  6. Step 6: Final answer
    x = 490,555.05

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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.