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Finding the Fourth Proportional to 2,486.12, 3,729.18 and 754.76

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Solution

The fourth proportional to 2,486.12, 3,729.18 and 754.76 is: 1,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.12 : 3,729.18 = 754.76 : x
  2. Step 2: Convert to fraction form
    2,486.12/3,729.18 = 754.76/x
  3. Step 3: Cross multiply
    2,486.12x = 3,729.18 × 754.76
  4. Step 4: Simplify right side
    2,486.12x = 2,814,635.90
  5. Step 5: Solve for x
    x = 2,814,635.90/2,486.12
  6. Step 6: Final answer
    x = 1,132.14

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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.