Home / 2,119.30-3,179.34-658.12

Finding the Fourth Proportional to 2,119.30, 3,179.34 and 658.12

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Solution

The fourth proportional to 2,119.30, 3,179.34 and 658.12 is: 987.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.30 : 3,179.34 = 658.12 : x
  2. Step 2: Convert to fraction form
    2,119.30/3,179.34 = 658.12/x
  3. Step 3: Cross multiply
    2,119.30x = 3,179.34 × 658.12
  4. Step 4: Simplify right side
    2,119.30x = 2,092,387.24
  5. Step 5: Solve for x
    x = 2,092,387.24/2,119.30
  6. Step 6: Final answer
    x = 987.30

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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.