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Finding the Fourth Proportional to 381,121.56, 525,909.82 and 220,028.60

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Solution

The fourth proportional to 381,121.56, 525,909.82 and 220,028.60 is: 303,617.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,121.56 : 525,909.82 = 220,028.60 : x
  2. Step 2: Convert to fraction form
    381,121.56/525,909.82 = 220,028.60/x
  3. Step 3: Cross multiply
    381,121.56x = 525,909.82 × 220,028.60
  4. Step 4: Simplify right side
    381,121.56x = 115,715,201,420.85
  5. Step 5: Solve for x
    x = 115,715,201,420.85/381,121.56
  6. Step 6: Final answer
    x = 303,617.57

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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.