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Finding the Fourth Proportional to 1,292.99, 1,940.27 and 1,188.43

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Solution

The fourth proportional to 1,292.99, 1,940.27 and 1,188.43 is: 1,783.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.99 : 1,940.27 = 1,188.43 : x
  2. Step 2: Convert to fraction form
    1,292.99/1,940.27 = 1,188.43/x
  3. Step 3: Cross multiply
    1,292.99x = 1,940.27 × 1,188.43
  4. Step 4: Simplify right side
    1,292.99x = 2,305,875.08
  5. Step 5: Solve for x
    x = 2,305,875.08/1,292.99
  6. Step 6: Final answer
    x = 1,783.37

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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.