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Finding the Fourth Proportional to 2,918.41, 4,377.56 and 838.43

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Solution

The fourth proportional to 2,918.41, 4,377.56 and 838.43 is: 1,257.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.41 : 4,377.56 = 838.43 : x
  2. Step 2: Convert to fraction form
    2,918.41/4,377.56 = 838.43/x
  3. Step 3: Cross multiply
    2,918.41x = 4,377.56 × 838.43
  4. Step 4: Simplify right side
    2,918.41x = 3,670,277.63
  5. Step 5: Solve for x
    x = 3,670,277.63/2,918.41
  6. Step 6: Final answer
    x = 1,257.63

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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.