Home / 2,486.50-3,431.37-1,382.50

Finding the Fourth Proportional to 2,486.50, 3,431.37 and 1,382.50

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Solution

The fourth proportional to 2,486.50, 3,431.37 and 1,382.50 is: 1,907.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.50 : 3,431.37 = 1,382.50 : x
  2. Step 2: Convert to fraction form
    2,486.50/3,431.37 = 1,382.50/x
  3. Step 3: Cross multiply
    2,486.50x = 3,431.37 × 1,382.50
  4. Step 4: Simplify right side
    2,486.50x = 4,743,869.03
  5. Step 5: Solve for x
    x = 4,743,869.03/2,486.50
  6. Step 6: Final answer
    x = 1,907.85

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1.5x scale

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.