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Finding the Fourth Proportional to 1,261.99, 1,892.46 and 743.03

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Solution

The fourth proportional to 1,261.99, 1,892.46 and 743.03 is: 1,114.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.99 : 1,892.46 = 743.03 : x
  2. Step 2: Convert to fraction form
    1,261.99/1,892.46 = 743.03/x
  3. Step 3: Cross multiply
    1,261.99x = 1,892.46 × 743.03
  4. Step 4: Simplify right side
    1,261.99x = 1,406,145.09
  5. Step 5: Solve for x
    x = 1,406,145.09/1,261.99
  6. Step 6: Final answer
    x = 1,114.23

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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.