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Finding the Fourth Proportional to 501,422.11, 691,958.45 and 271,978.82

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Solution

The fourth proportional to 501,422.11, 691,958.45 and 271,978.82 is: 375,328.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,422.11 : 691,958.45 = 271,978.82 : x
  2. Step 2: Convert to fraction form
    501,422.11/691,958.45 = 271,978.82/x
  3. Step 3: Cross multiply
    501,422.11x = 691,958.45 × 271,978.82
  4. Step 4: Simplify right side
    501,422.11x = 188,198,043,769.98
  5. Step 5: Solve for x
    x = 188,198,043,769.98/501,422.11
  6. Step 6: Final answer
    x = 375,328.57

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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.