Home / 1,418.45-2,128.12-541.22

Finding the Fourth Proportional to 1,418.45, 2,128.12 and 541.22

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Solution

The fourth proportional to 1,418.45, 2,128.12 and 541.22 is: 811.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.45 : 2,128.12 = 541.22 : x
  2. Step 2: Convert to fraction form
    1,418.45/2,128.12 = 541.22/x
  3. Step 3: Cross multiply
    1,418.45x = 2,128.12 × 541.22
  4. Step 4: Simplify right side
    1,418.45x = 1,151,769.11
  5. Step 5: Solve for x
    x = 1,151,769.11/1,418.45
  6. Step 6: Final answer
    x = 811.99

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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.