Home / 1,087.26-1,629.87-393.76

Finding the Fourth Proportional to 1,087.26, 1,629.87 and 393.76

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Solution

The fourth proportional to 1,087.26, 1,629.87 and 393.76 is: 590.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.26 : 1,629.87 = 393.76 : x
  2. Step 2: Convert to fraction form
    1,087.26/1,629.87 = 393.76/x
  3. Step 3: Cross multiply
    1,087.26x = 1,629.87 × 393.76
  4. Step 4: Simplify right side
    1,087.26x = 641,777.61
  5. Step 5: Solve for x
    x = 641,777.61/1,087.26
  6. Step 6: Final answer
    x = 590.27

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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.