Home / 1,515.21-2,082.11-1,234.85

Finding the Fourth Proportional to 1,515.21, 2,082.11 and 1,234.85

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Solution

The fourth proportional to 1,515.21, 2,082.11 and 1,234.85 is: 1,696.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.21 : 2,082.11 = 1,234.85 : x
  2. Step 2: Convert to fraction form
    1,515.21/2,082.11 = 1,234.85/x
  3. Step 3: Cross multiply
    1,515.21x = 2,082.11 × 1,234.85
  4. Step 4: Simplify right side
    1,515.21x = 2,571,076.95
  5. Step 5: Solve for x
    x = 2,571,076.95/1,515.21
  6. Step 6: Final answer
    x = 1,696.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.