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Finding the Fourth Proportional to 1,838.48, 2,757.90 and 605.90

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Solution

The fourth proportional to 1,838.48, 2,757.90 and 605.90 is: 908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.48 : 2,757.90 = 605.90 : x
  2. Step 2: Convert to fraction form
    1,838.48/2,757.90 = 605.90/x
  3. Step 3: Cross multiply
    1,838.48x = 2,757.90 × 605.90
  4. Step 4: Simplify right side
    1,838.48x = 1,670,997.82
  5. Step 5: Solve for x
    x = 1,670,997.82/1,838.48
  6. Step 6: Final answer
    x = 908.90

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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.