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Finding the Fourth Proportional to 398,947.98, 550,546.88 and 217,659.96

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Solution

The fourth proportional to 398,947.98, 550,546.88 and 217,659.96 is: 300,370.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,947.98 : 550,546.88 = 217,659.96 : x
  2. Step 2: Convert to fraction form
    398,947.98/550,546.88 = 217,659.96/x
  3. Step 3: Cross multiply
    398,947.98x = 550,546.88 × 217,659.96
  4. Step 4: Simplify right side
    398,947.98x = 119,832,010,790.63
  5. Step 5: Solve for x
    x = 119,832,010,790.63/398,947.98
  6. Step 6: Final answer
    x = 300,370.01

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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.