Home / 3,391.88-5,087.30-1,312.85

Finding the Fourth Proportional to 3,391.88, 5,087.30 and 1,312.85

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Solution

The fourth proportional to 3,391.88, 5,087.30 and 1,312.85 is: 1,969.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.88 : 5,087.30 = 1,312.85 : x
  2. Step 2: Convert to fraction form
    3,391.88/5,087.30 = 1,312.85/x
  3. Step 3: Cross multiply
    3,391.88x = 5,087.30 × 1,312.85
  4. Step 4: Simplify right side
    3,391.88x = 6,678,855.24
  5. Step 5: Solve for x
    x = 6,678,855.24/3,391.88
  6. Step 6: Final answer
    x = 1,969.07

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1.5x scale

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.