Home / 1,515.19-2,090.99-843.05

Finding the Fourth Proportional to 1,515.19, 2,090.99 and 843.05

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Solution

The fourth proportional to 1,515.19, 2,090.99 and 843.05 is: 1,163.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.19 : 2,090.99 = 843.05 : x
  2. Step 2: Convert to fraction form
    1,515.19/2,090.99 = 843.05/x
  3. Step 3: Cross multiply
    1,515.19x = 2,090.99 × 843.05
  4. Step 4: Simplify right side
    1,515.19x = 1,762,809.12
  5. Step 5: Solve for x
    x = 1,762,809.12/1,515.19
  6. Step 6: Final answer
    x = 1,163.42

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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.