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Finding the Fourth Proportional to 1,260.26, 1,738.56 and 818

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Solution

The fourth proportional to 1,260.26, 1,738.56 and 818 is: 1,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.26 : 1,738.56 = 818 : x
  2. Step 2: Convert to fraction form
    1,260.26/1,738.56 = 818/x
  3. Step 3: Cross multiply
    1,260.26x = 1,738.56 × 818
  4. Step 4: Simplify right side
    1,260.26x = 1,422,142.08
  5. Step 5: Solve for x
    x = 1,422,142.08/1,260.26
  6. Step 6: Final answer
    x = 1,128.45

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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.