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Finding the Fourth Proportional to 3,801.78, 5,247.99 and 3,215.34

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Solution

The fourth proportional to 3,801.78, 5,247.99 and 3,215.34 is: 4,438.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,801.78 : 5,247.99 = 3,215.34 : x
  2. Step 2: Convert to fraction form
    3,801.78/5,247.99 = 3,215.34/x
  3. Step 3: Cross multiply
    3,801.78x = 5,247.99 × 3,215.34
  4. Step 4: Simplify right side
    3,801.78x = 16,874,072.17
  5. Step 5: Solve for x
    x = 16,874,072.17/3,801.78
  6. Step 6: Final answer
    x = 4,438.47

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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.