Home / 3,085.21-4,257.62-1,687.96

Finding the Fourth Proportional to 3,085.21, 4,257.62 and 1,687.96

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Solution

The fourth proportional to 3,085.21, 4,257.62 and 1,687.96 is: 2,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,085.21 : 4,257.62 = 1,687.96 : x
  2. Step 2: Convert to fraction form
    3,085.21/4,257.62 = 1,687.96/x
  3. Step 3: Cross multiply
    3,085.21x = 4,257.62 × 1,687.96
  4. Step 4: Simplify right side
    3,085.21x = 7,186,692.26
  5. Step 5: Solve for x
    x = 7,186,692.26/3,085.21
  6. Step 6: Final answer
    x = 2,329.40

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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.