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Finding the Fourth Proportional to 1,921.88, 2,879.02 and 1,270.64

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Solution

The fourth proportional to 1,921.88, 2,879.02 and 1,270.64 is: 1,903.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.88 : 2,879.02 = 1,270.64 : x
  2. Step 2: Convert to fraction form
    1,921.88/2,879.02 = 1,270.64/x
  3. Step 3: Cross multiply
    1,921.88x = 2,879.02 × 1,270.64
  4. Step 4: Simplify right side
    1,921.88x = 3,658,197.97
  5. Step 5: Solve for x
    x = 3,658,197.97/1,921.88
  6. Step 6: Final answer
    x = 1,903.45

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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.