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Finding the Fourth Proportional to 2,933.78, 4,400.18 and 1,085.78

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Solution

The fourth proportional to 2,933.78, 4,400.18 and 1,085.78 is: 1,628.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,933.78 : 4,400.18 = 1,085.78 : x
  2. Step 2: Convert to fraction form
    2,933.78/4,400.18 = 1,085.78/x
  3. Step 3: Cross multiply
    2,933.78x = 4,400.18 × 1,085.78
  4. Step 4: Simplify right side
    2,933.78x = 4,777,627.44
  5. Step 5: Solve for x
    x = 4,777,627.44/2,933.78
  6. Step 6: Final answer
    x = 1,628.49

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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.