Home / 1,158.73-1,738.26-428.23

Finding the Fourth Proportional to 1,158.73, 1,738.26 and 428.23

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Solution

The fourth proportional to 1,158.73, 1,738.26 and 428.23 is: 642.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.73 : 1,738.26 = 428.23 : x
  2. Step 2: Convert to fraction form
    1,158.73/1,738.26 = 428.23/x
  3. Step 3: Cross multiply
    1,158.73x = 1,738.26 × 428.23
  4. Step 4: Simplify right side
    1,158.73x = 744,375.08
  5. Step 5: Solve for x
    x = 744,375.08/1,158.73
  6. Step 6: Final answer
    x = 642.41

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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.