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Finding the Fourth Proportional to 1,910, 2,634.36 and 1,321.52

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Solution

The fourth proportional to 1,910, 2,634.36 and 1,321.52 is: 1,822.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910 : 2,634.36 = 1,321.52 : x
  2. Step 2: Convert to fraction form
    1,910/2,634.36 = 1,321.52/x
  3. Step 3: Cross multiply
    1,910x = 2,634.36 × 1,321.52
  4. Step 4: Simplify right side
    1,910x = 3,481,359.43
  5. Step 5: Solve for x
    x = 3,481,359.43/1,910
  6. Step 6: Final answer
    x = 1,822.70

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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.