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Finding the Fourth Proportional to 1,273.80, 1,911.00 and 396.26

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Solution

The fourth proportional to 1,273.80, 1,911.00 and 396.26 is: 594.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.80 : 1,911.00 = 396.26 : x
  2. Step 2: Convert to fraction form
    1,273.80/1,911.00 = 396.26/x
  3. Step 3: Cross multiply
    1,273.80x = 1,911.00 × 396.26
  4. Step 4: Simplify right side
    1,273.80x = 757,259.12
  5. Step 5: Solve for x
    x = 757,259.12/1,273.80
  6. Step 6: Final answer
    x = 594.49

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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.