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Finding the Fourth Proportional to 3,638, 5,457 and 1,586

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Solution

The fourth proportional to 3,638, 5,457 and 1,586 is: 2,379

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638 : 5,457 = 1,586 : x
  2. Step 2: Convert to fraction form
    3,638/5,457 = 1,586/x
  3. Step 3: Cross multiply
    3,638x = 5,457 × 1,586
  4. Step 4: Simplify right side
    3,638x = 8,654,802
  5. Step 5: Solve for x
    x = 8,654,802/3,638
  6. Step 6: Final answer
    x = 2,379

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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.