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Finding the Fourth Proportional to 1,028.01, 1,419.54 and 806.58

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Solution

The fourth proportional to 1,028.01, 1,419.54 and 806.58 is: 1,113.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.01 : 1,419.54 = 806.58 : x
  2. Step 2: Convert to fraction form
    1,028.01/1,419.54 = 806.58/x
  3. Step 3: Cross multiply
    1,028.01x = 1,419.54 × 806.58
  4. Step 4: Simplify right side
    1,028.01x = 1,144,972.57
  5. Step 5: Solve for x
    x = 1,144,972.57/1,028.01
  6. Step 6: Final answer
    x = 1,113.78

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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.