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Finding the Fourth Proportional to 2,486.70, 3,729.93 and 1,005.49

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Solution

The fourth proportional to 2,486.70, 3,729.93 and 1,005.49 is: 1,508.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.70 : 3,729.93 = 1,005.49 : x
  2. Step 2: Convert to fraction form
    2,486.70/3,729.93 = 1,005.49/x
  3. Step 3: Cross multiply
    2,486.70x = 3,729.93 × 1,005.49
  4. Step 4: Simplify right side
    2,486.70x = 3,750,408.21
  5. Step 5: Solve for x
    x = 3,750,408.21/2,486.70
  6. Step 6: Final answer
    x = 1,508.19

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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.