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Finding the Fourth Proportional to 1,198.05, 1,651.26 and 1,028.76

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Solution

The fourth proportional to 1,198.05, 1,651.26 and 1,028.76 is: 1,417.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.05 : 1,651.26 = 1,028.76 : x
  2. Step 2: Convert to fraction form
    1,198.05/1,651.26 = 1,028.76/x
  3. Step 3: Cross multiply
    1,198.05x = 1,651.26 × 1,028.76
  4. Step 4: Simplify right side
    1,198.05x = 1,698,750.24
  5. Step 5: Solve for x
    x = 1,698,750.24/1,198.05
  6. Step 6: Final answer
    x = 1,417.93

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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.