Home / 1,515.49-2,091.22-852.20

Finding the Fourth Proportional to 1,515.49, 2,091.22 and 852.20

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Solution

The fourth proportional to 1,515.49, 2,091.22 and 852.20 is: 1,175.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.49 : 2,091.22 = 852.20 : x
  2. Step 2: Convert to fraction form
    1,515.49/2,091.22 = 852.20/x
  3. Step 3: Cross multiply
    1,515.49x = 2,091.22 × 852.20
  4. Step 4: Simplify right side
    1,515.49x = 1,782,144.70
  5. Step 5: Solve for x
    x = 1,782,144.70/1,515.49
  6. Step 6: Final answer
    x = 1,175.95

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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.