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Finding the Fourth Proportional to 2,408.67, 3,612.99 and 1,239

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Solution

The fourth proportional to 2,408.67, 3,612.99 and 1,239 is: 1,858.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,408.67 : 3,612.99 = 1,239 : x
  2. Step 2: Convert to fraction form
    2,408.67/3,612.99 = 1,239/x
  3. Step 3: Cross multiply
    2,408.67x = 3,612.99 × 1,239
  4. Step 4: Simplify right side
    2,408.67x = 4,476,489.96
  5. Step 5: Solve for x
    x = 4,476,489.96/2,408.67
  6. Step 6: Final answer
    x = 1,858.49

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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.