Home / 2,142.17-3,213.13-681.13

Finding the Fourth Proportional to 2,142.17, 3,213.13 and 681.13

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Solution

The fourth proportional to 2,142.17, 3,213.13 and 681.13 is: 1,021.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.17 : 3,213.13 = 681.13 : x
  2. Step 2: Convert to fraction form
    2,142.17/3,213.13 = 681.13/x
  3. Step 3: Cross multiply
    2,142.17x = 3,213.13 × 681.13
  4. Step 4: Simplify right side
    2,142.17x = 2,188,559.24
  5. Step 5: Solve for x
    x = 2,188,559.24/2,142.17
  6. Step 6: Final answer
    x = 1,021.66

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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.