Home / 1,515.12-2,272.68-1,211.67

Finding the Fourth Proportional to 1,515.12, 2,272.68 and 1,211.67

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Solution

The fourth proportional to 1,515.12, 2,272.68 and 1,211.67 is: 1,817.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.12 : 2,272.68 = 1,211.67 : x
  2. Step 2: Convert to fraction form
    1,515.12/2,272.68 = 1,211.67/x
  3. Step 3: Cross multiply
    1,515.12x = 2,272.68 × 1,211.67
  4. Step 4: Simplify right side
    1,515.12x = 2,753,738.18
  5. Step 5: Solve for x
    x = 2,753,738.18/1,515.12
  6. Step 6: Final answer
    x = 1,817.51

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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.