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Finding the Fourth Proportional to 1,257.63, 1,736.43 and 838.97

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Solution

The fourth proportional to 1,257.63, 1,736.43 and 838.97 is: 1,158.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.63 : 1,736.43 = 838.97 : x
  2. Step 2: Convert to fraction form
    1,257.63/1,736.43 = 838.97/x
  3. Step 3: Cross multiply
    1,257.63x = 1,736.43 × 838.97
  4. Step 4: Simplify right side
    1,257.63x = 1,456,803.99
  5. Step 5: Solve for x
    x = 1,456,803.99/1,257.63
  6. Step 6: Final answer
    x = 1,158.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.