Home / 1,028.07-1,418.46-629.40

Finding the Fourth Proportional to 1,028.07, 1,418.46 and 629.40

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Solution

The fourth proportional to 1,028.07, 1,418.46 and 629.40 is: 868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.07 : 1,418.46 = 629.40 : x
  2. Step 2: Convert to fraction form
    1,028.07/1,418.46 = 629.40/x
  3. Step 3: Cross multiply
    1,028.07x = 1,418.46 × 629.40
  4. Step 4: Simplify right side
    1,028.07x = 892,778.72
  5. Step 5: Solve for x
    x = 892,778.72/1,028.07
  6. Step 6: Final answer
    x = 868.40

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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.