Home / 1,086.72-1,634.40-1,021.44

Finding the Fourth Proportional to 1,086.72, 1,634.40 and 1,021.44

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Solution

The fourth proportional to 1,086.72, 1,634.40 and 1,021.44 is: 1,536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.72 : 1,634.40 = 1,021.44 : x
  2. Step 2: Convert to fraction form
    1,086.72/1,634.40 = 1,021.44/x
  3. Step 3: Cross multiply
    1,086.72x = 1,634.40 × 1,021.44
  4. Step 4: Simplify right side
    1,086.72x = 1,669,441.54
  5. Step 5: Solve for x
    x = 1,669,441.54/1,086.72
  6. Step 6: Final answer
    x = 1,536.22

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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.