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Finding the Fourth Proportional to 381,073.55, 525,843.60 and 219,980.50

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Solution

The fourth proportional to 381,073.55, 525,843.60 and 219,980.50 is: 303,551.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,073.55 : 525,843.60 = 219,980.50 : x
  2. Step 2: Convert to fraction form
    381,073.55/525,843.60 = 219,980.50/x
  3. Step 3: Cross multiply
    381,073.55x = 525,843.60 × 219,980.50
  4. Step 4: Simplify right side
    381,073.55x = 115,675,338,049.80
  5. Step 5: Solve for x
    x = 115,675,338,049.80/381,073.55
  6. Step 6: Final answer
    x = 303,551.21

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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.