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Finding the Fourth Proportional to 1,375.45, 1,896.77 and 1,261.62

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Solution

The fourth proportional to 1,375.45, 1,896.77 and 1,261.62 is: 1,739.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.45 : 1,896.77 = 1,261.62 : x
  2. Step 2: Convert to fraction form
    1,375.45/1,896.77 = 1,261.62/x
  3. Step 3: Cross multiply
    1,375.45x = 1,896.77 × 1,261.62
  4. Step 4: Simplify right side
    1,375.45x = 2,393,002.97
  5. Step 5: Solve for x
    x = 2,393,002.97/1,375.45
  6. Step 6: Final answer
    x = 1,739.80

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1.5x scale

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.