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Finding the Fourth Proportional to 1,393.03, 2,090.54 and 1,028.80

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Solution

The fourth proportional to 1,393.03, 2,090.54 and 1,028.80 is: 1,543.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.03 : 2,090.54 = 1,028.80 : x
  2. Step 2: Convert to fraction form
    1,393.03/2,090.54 = 1,028.80/x
  3. Step 3: Cross multiply
    1,393.03x = 2,090.54 × 1,028.80
  4. Step 4: Simplify right side
    1,393.03x = 2,150,747.55
  5. Step 5: Solve for x
    x = 2,150,747.55/1,393.03
  6. Step 6: Final answer
    x = 1,543.93

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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.