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Finding the Fourth Proportional to 501,139, 691,571.87 and 274,789.36

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Solution

The fourth proportional to 501,139, 691,571.87 and 274,789.36 is: 379,209.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,139 : 691,571.87 = 274,789.36 : x
  2. Step 2: Convert to fraction form
    501,139/691,571.87 = 274,789.36/x
  3. Step 3: Cross multiply
    501,139x = 691,571.87 × 274,789.36
  4. Step 4: Simplify right side
    501,139x = 190,036,591,551.30
  5. Step 5: Solve for x
    x = 190,036,591,551.30/501,139
  6. Step 6: Final answer
    x = 379,209.34

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1.5x scale

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.