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Finding the Fourth Proportional to 1,240.36, 1,860.60 and 727

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Solution

The fourth proportional to 1,240.36, 1,860.60 and 727 is: 1,090.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.36 : 1,860.60 = 727 : x
  2. Step 2: Convert to fraction form
    1,240.36/1,860.60 = 727/x
  3. Step 3: Cross multiply
    1,240.36x = 1,860.60 × 727
  4. Step 4: Simplify right side
    1,240.36x = 1,352,656.20
  5. Step 5: Solve for x
    x = 1,352,656.20/1,240.36
  6. Step 6: Final answer
    x = 1,090.54

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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.