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Finding the Fourth Proportional to 3,918.84, 5,878.36 and 1,969.96

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Solution

The fourth proportional to 3,918.84, 5,878.36 and 1,969.96 is: 2,954.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.84 : 5,878.36 = 1,969.96 : x
  2. Step 2: Convert to fraction form
    3,918.84/5,878.36 = 1,969.96/x
  3. Step 3: Cross multiply
    3,918.84x = 5,878.36 × 1,969.96
  4. Step 4: Simplify right side
    3,918.84x = 11,580,134.07
  5. Step 5: Solve for x
    x = 11,580,134.07/3,918.84
  6. Step 6: Final answer
    x = 2,954.99

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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.