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Finding the Fourth Proportional to 398,863.58, 550,435.25 and 217,576.34

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Solution

The fourth proportional to 398,863.58, 550,435.25 and 217,576.34 is: 300,257.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,863.58 : 550,435.25 = 217,576.34 : x
  2. Step 2: Convert to fraction form
    398,863.58/550,435.25 = 217,576.34/x
  3. Step 3: Cross multiply
    398,863.58x = 550,435.25 × 217,576.34
  4. Step 4: Simplify right side
    398,863.58x = 119,761,684,893.75
  5. Step 5: Solve for x
    x = 119,761,684,893.75/398,863.58
  6. Step 6: Final answer
    x = 300,257.26

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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.