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Finding the Fourth Proportional to 1,999.72, 3,014.81 and 1,858.78

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Solution

The fourth proportional to 1,999.72, 3,014.81 and 1,858.78 is: 2,802.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.72 : 3,014.81 = 1,858.78 : x
  2. Step 2: Convert to fraction form
    1,999.72/3,014.81 = 1,858.78/x
  3. Step 3: Cross multiply
    1,999.72x = 3,014.81 × 1,858.78
  4. Step 4: Simplify right side
    1,999.72x = 5,603,851.70
  5. Step 5: Solve for x
    x = 5,603,851.70/1,999.72
  6. Step 6: Final answer
    x = 2,802.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.