Home / 1,515.36-2,091.12-852.20

Finding the Fourth Proportional to 1,515.36, 2,091.12 and 852.20

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Solution

The fourth proportional to 1,515.36, 2,091.12 and 852.20 is: 1,175.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.36 : 2,091.12 = 852.20 : x
  2. Step 2: Convert to fraction form
    1,515.36/2,091.12 = 852.20/x
  3. Step 3: Cross multiply
    1,515.36x = 2,091.12 × 852.20
  4. Step 4: Simplify right side
    1,515.36x = 1,782,052.46
  5. Step 5: Solve for x
    x = 1,782,052.46/1,515.36
  6. Step 6: Final answer
    x = 1,175.99

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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.