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Finding the Fourth Proportional to 1,241.72, 1,861.64 and 754.64

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Solution

The fourth proportional to 1,241.72, 1,861.64 and 754.64 is: 1,131.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.72 : 1,861.64 = 754.64 : x
  2. Step 2: Convert to fraction form
    1,241.72/1,861.64 = 754.64/x
  3. Step 3: Cross multiply
    1,241.72x = 1,861.64 × 754.64
  4. Step 4: Simplify right side
    1,241.72x = 1,404,868.01
  5. Step 5: Solve for x
    x = 1,404,868.01/1,241.72
  6. Step 6: Final answer
    x = 1,131.39

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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.