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Finding the Fourth Proportional to 1,218.26, 1,825.68 and 943.09

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Solution

The fourth proportional to 1,218.26, 1,825.68 and 943.09 is: 1,413.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.26 : 1,825.68 = 943.09 : x
  2. Step 2: Convert to fraction form
    1,218.26/1,825.68 = 943.09/x
  3. Step 3: Cross multiply
    1,218.26x = 1,825.68 × 943.09
  4. Step 4: Simplify right side
    1,218.26x = 1,721,780.55
  5. Step 5: Solve for x
    x = 1,721,780.55/1,218.26
  6. Step 6: Final answer
    x = 1,413.31

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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.