Home / 3,315.75-4,575.57-1,989.20

Finding the Fourth Proportional to 3,315.75, 4,575.57 and 1,989.20

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Solution

The fourth proportional to 3,315.75, 4,575.57 and 1,989.20 is: 2,745.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.75 : 4,575.57 = 1,989.20 : x
  2. Step 2: Convert to fraction form
    3,315.75/4,575.57 = 1,989.20/x
  3. Step 3: Cross multiply
    3,315.75x = 4,575.57 × 1,989.20
  4. Step 4: Simplify right side
    3,315.75x = 9,101,723.84
  5. Step 5: Solve for x
    x = 9,101,723.84/3,315.75
  6. Step 6: Final answer
    x = 2,745.00

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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.