Home / 1,782.21-2,670.36-1,086.78

Finding the Fourth Proportional to 1,782.21, 2,670.36 and 1,086.78

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Solution

The fourth proportional to 1,782.21, 2,670.36 and 1,086.78 is: 1,628.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.21 : 2,670.36 = 1,086.78 : x
  2. Step 2: Convert to fraction form
    1,782.21/2,670.36 = 1,086.78/x
  3. Step 3: Cross multiply
    1,782.21x = 2,670.36 × 1,086.78
  4. Step 4: Simplify right side
    1,782.21x = 2,902,093.84
  5. Step 5: Solve for x
    x = 2,902,093.84/1,782.21
  6. Step 6: Final answer
    x = 1,628.37

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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.