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Finding the Fourth Proportional to 398,813.75, 550,363.02 and 219,965.75

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Solution

The fourth proportional to 398,813.75, 550,363.02 and 219,965.75 is: 303,552.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,813.75 : 550,363.02 = 219,965.75 : x
  2. Step 2: Convert to fraction form
    398,813.75/550,363.02 = 219,965.75/x
  3. Step 3: Cross multiply
    398,813.75x = 550,363.02 × 219,965.75
  4. Step 4: Simplify right side
    398,813.75x = 121,061,014,466.57
  5. Step 5: Solve for x
    x = 121,061,014,466.57/398,813.75
  6. Step 6: Final answer
    x = 303,552.76

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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.