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Finding the Fourth Proportional to 3,849.71, 5,774.94 and 1,385.48

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Solution

The fourth proportional to 3,849.71, 5,774.94 and 1,385.48 is: 2,078.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,849.71 : 5,774.94 = 1,385.48 : x
  2. Step 2: Convert to fraction form
    3,849.71/5,774.94 = 1,385.48/x
  3. Step 3: Cross multiply
    3,849.71x = 5,774.94 × 1,385.48
  4. Step 4: Simplify right side
    3,849.71x = 8,001,078.31
  5. Step 5: Solve for x
    x = 8,001,078.31/3,849.71
  6. Step 6: Final answer
    x = 2,078.36

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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.