Home / 1,851.15-2,775.09-680.31

Finding the Fourth Proportional to 1,851.15, 2,775.09 and 680.31

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Solution

The fourth proportional to 1,851.15, 2,775.09 and 680.31 is: 1,019.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.15 : 2,775.09 = 680.31 : x
  2. Step 2: Convert to fraction form
    1,851.15/2,775.09 = 680.31/x
  3. Step 3: Cross multiply
    1,851.15x = 2,775.09 × 680.31
  4. Step 4: Simplify right side
    1,851.15x = 1,887,921.48
  5. Step 5: Solve for x
    x = 1,887,921.48/1,851.15
  6. Step 6: Final answer
    x = 1,019.86

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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.