Home / 2,090.30-3,135.42-857.79

Finding the Fourth Proportional to 2,090.30, 3,135.42 and 857.79

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Solution

The fourth proportional to 2,090.30, 3,135.42 and 857.79 is: 1,286.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.30 : 3,135.42 = 857.79 : x
  2. Step 2: Convert to fraction form
    2,090.30/3,135.42 = 857.79/x
  3. Step 3: Cross multiply
    2,090.30x = 3,135.42 × 857.79
  4. Step 4: Simplify right side
    2,090.30x = 2,689,531.92
  5. Step 5: Solve for x
    x = 2,689,531.92/2,090.30
  6. Step 6: Final answer
    x = 1,286.68

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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.