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Finding the Fourth Proportional to 398,563.92, 550,014.60 and 219,715.92

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Solution

The fourth proportional to 398,563.92, 550,014.60 and 219,715.92 is: 303,205.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,563.92 : 550,014.60 = 219,715.92 : x
  2. Step 2: Convert to fraction form
    398,563.92/550,014.60 = 219,715.92/x
  3. Step 3: Cross multiply
    398,563.92x = 550,014.60 × 219,715.92
  4. Step 4: Simplify right side
    398,563.92x = 120,846,963,852.43
  5. Step 5: Solve for x
    x = 120,846,963,852.43/398,563.92
  6. Step 6: Final answer
    x = 303,205.98

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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.