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Finding the Fourth Proportional to 1,100.20, 1,659.43 and 1,028.20

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Solution

The fourth proportional to 1,100.20, 1,659.43 and 1,028.20 is: 1,550.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.20 : 1,659.43 = 1,028.20 : x
  2. Step 2: Convert to fraction form
    1,100.20/1,659.43 = 1,028.20/x
  3. Step 3: Cross multiply
    1,100.20x = 1,659.43 × 1,028.20
  4. Step 4: Simplify right side
    1,100.20x = 1,706,225.93
  5. Step 5: Solve for x
    x = 1,706,225.93/1,100.20
  6. Step 6: Final answer
    x = 1,550.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.