Home / 3,938.90-5,903.82-1,438.97

Finding the Fourth Proportional to 3,938.90, 5,903.82 and 1,438.97

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Solution

The fourth proportional to 3,938.90, 5,903.82 and 1,438.97 is: 2,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.90 : 5,903.82 = 1,438.97 : x
  2. Step 2: Convert to fraction form
    3,938.90/5,903.82 = 1,438.97/x
  3. Step 3: Cross multiply
    3,938.90x = 5,903.82 × 1,438.97
  4. Step 4: Simplify right side
    3,938.90x = 8,495,390.35
  5. Step 5: Solve for x
    x = 8,495,390.35/3,938.90
  6. Step 6: Final answer
    x = 2,156.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.