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Finding the Fourth Proportional to 3,368.75, 5,040.78 and 1,982.72

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Solution

The fourth proportional to 3,368.75, 5,040.78 and 1,982.72 is: 2,966.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,368.75 : 5,040.78 = 1,982.72 : x
  2. Step 2: Convert to fraction form
    3,368.75/5,040.78 = 1,982.72/x
  3. Step 3: Cross multiply
    3,368.75x = 5,040.78 × 1,982.72
  4. Step 4: Simplify right side
    3,368.75x = 9,994,430.12
  5. Step 5: Solve for x
    x = 9,994,430.12/3,368.75
  6. Step 6: Final answer
    x = 2,966.81

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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.