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Finding the Fourth Proportional to 1,273.28, 1,910.84 and 451.55

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Solution

The fourth proportional to 1,273.28, 1,910.84 and 451.55 is: 677.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.28 : 1,910.84 = 451.55 : x
  2. Step 2: Convert to fraction form
    1,273.28/1,910.84 = 451.55/x
  3. Step 3: Cross multiply
    1,273.28x = 1,910.84 × 451.55
  4. Step 4: Simplify right side
    1,273.28x = 862,842.32
  5. Step 5: Solve for x
    x = 862,842.32/1,273.28
  6. Step 6: Final answer
    x = 677.66

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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.