Home / 1,028.19-1,418.78-608.55

Finding the Fourth Proportional to 1,028.19, 1,418.78 and 608.55

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Solution

The fourth proportional to 1,028.19, 1,418.78 and 608.55 is: 839.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.19 : 1,418.78 = 608.55 : x
  2. Step 2: Convert to fraction form
    1,028.19/1,418.78 = 608.55/x
  3. Step 3: Cross multiply
    1,028.19x = 1,418.78 × 608.55
  4. Step 4: Simplify right side
    1,028.19x = 863,398.57
  5. Step 5: Solve for x
    x = 863,398.57/1,028.19
  6. Step 6: Final answer
    x = 839.73

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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.