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Finding the Fourth Proportional to 2,389.89, 3,583.97 and 829.47

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Solution

The fourth proportional to 2,389.89, 3,583.97 and 829.47 is: 1,243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.89 : 3,583.97 = 829.47 : x
  2. Step 2: Convert to fraction form
    2,389.89/3,583.97 = 829.47/x
  3. Step 3: Cross multiply
    2,389.89x = 3,583.97 × 829.47
  4. Step 4: Simplify right side
    2,389.89x = 2,972,795.60
  5. Step 5: Solve for x
    x = 2,972,795.60/2,389.89
  6. Step 6: Final answer
    x = 1,243.90

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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.