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Finding the Fourth Proportional to 2,486.38, 3,729.65 and 755

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Solution

The fourth proportional to 2,486.38, 3,729.65 and 755 is: 1,132.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.38 : 3,729.65 = 755 : x
  2. Step 2: Convert to fraction form
    2,486.38/3,729.65 = 755/x
  3. Step 3: Cross multiply
    2,486.38x = 3,729.65 × 755
  4. Step 4: Simplify right side
    2,486.38x = 2,815,885.75
  5. Step 5: Solve for x
    x = 2,815,885.75/2,486.38
  6. Step 6: Final answer
    x = 1,132.52

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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.