Home / 1,851.36-2,778.30-986.28

Finding the Fourth Proportional to 1,851.36, 2,778.30 and 986.28

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Solution

The fourth proportional to 1,851.36, 2,778.30 and 986.28 is: 1,480.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.36 : 2,778.30 = 986.28 : x
  2. Step 2: Convert to fraction form
    1,851.36/2,778.30 = 986.28/x
  3. Step 3: Cross multiply
    1,851.36x = 2,778.30 × 986.28
  4. Step 4: Simplify right side
    1,851.36x = 2,740,181.72
  5. Step 5: Solve for x
    x = 2,740,181.72/1,851.36
  6. Step 6: Final answer
    x = 1,480.09

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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.