Home / 1,087.31-1,629.33-539.85

Finding the Fourth Proportional to 1,087.31, 1,629.33 and 539.85

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Solution

The fourth proportional to 1,087.31, 1,629.33 and 539.85 is: 808.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.31 : 1,629.33 = 539.85 : x
  2. Step 2: Convert to fraction form
    1,087.31/1,629.33 = 539.85/x
  3. Step 3: Cross multiply
    1,087.31x = 1,629.33 × 539.85
  4. Step 4: Simplify right side
    1,087.31x = 879,593.80
  5. Step 5: Solve for x
    x = 879,593.80/1,087.31
  6. Step 6: Final answer
    x = 808.97

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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.