Home / 2,851.78-3,935.64-1,672.42

Finding the Fourth Proportional to 2,851.78, 3,935.64 and 1,672.42

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Solution

The fourth proportional to 2,851.78, 3,935.64 and 1,672.42 is: 2,308.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.78 : 3,935.64 = 1,672.42 : x
  2. Step 2: Convert to fraction form
    2,851.78/3,935.64 = 1,672.42/x
  3. Step 3: Cross multiply
    2,851.78x = 3,935.64 × 1,672.42
  4. Step 4: Simplify right side
    2,851.78x = 6,582,043.05
  5. Step 5: Solve for x
    x = 6,582,043.05/2,851.78
  6. Step 6: Final answer
    x = 2,308.05

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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.