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Finding the Fourth Proportional to 381,076.45, 525,847.61 and 219,983.40

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Solution

The fourth proportional to 381,076.45, 525,847.61 and 219,983.40 is: 303,555.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,076.45 : 525,847.61 = 219,983.40 : x
  2. Step 2: Convert to fraction form
    381,076.45/525,847.61 = 219,983.40/x
  3. Step 3: Cross multiply
    381,076.45x = 525,847.61 × 219,983.40
  4. Step 4: Simplify right side
    381,076.45x = 115,677,744,029.76
  5. Step 5: Solve for x
    x = 115,677,744,029.76/381,076.45
  6. Step 6: Final answer
    x = 303,555.21

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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.