Home / 1,949.78-2,690.36-1,851.28

Finding the Fourth Proportional to 1,949.78, 2,690.36 and 1,851.28

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Solution

The fourth proportional to 1,949.78, 2,690.36 and 1,851.28 is: 2,554.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.78 : 2,690.36 = 1,851.28 : x
  2. Step 2: Convert to fraction form
    1,949.78/2,690.36 = 1,851.28/x
  3. Step 3: Cross multiply
    1,949.78x = 2,690.36 × 1,851.28
  4. Step 4: Simplify right side
    1,949.78x = 4,980,609.66
  5. Step 5: Solve for x
    x = 4,980,609.66/1,949.78
  6. Step 6: Final answer
    x = 2,554.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.