Home / 1,418.49-2,128.20-1,213.46

Finding the Fourth Proportional to 1,418.49, 2,128.20 and 1,213.46

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Solution

The fourth proportional to 1,418.49, 2,128.20 and 1,213.46 is: 1,820.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.49 : 2,128.20 = 1,213.46 : x
  2. Step 2: Convert to fraction form
    1,418.49/2,128.20 = 1,213.46/x
  3. Step 3: Cross multiply
    1,418.49x = 2,128.20 × 1,213.46
  4. Step 4: Simplify right side
    1,418.49x = 2,582,485.57
  5. Step 5: Solve for x
    x = 2,582,485.57/1,418.49
  6. Step 6: Final answer
    x = 1,820.59

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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.