Home / 3,418.80-5,128.20-1,110.30

Finding the Fourth Proportional to 3,418.80, 5,128.20 and 1,110.30

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Solution

The fourth proportional to 3,418.80, 5,128.20 and 1,110.30 is: 1,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.80 : 5,128.20 = 1,110.30 : x
  2. Step 2: Convert to fraction form
    3,418.80/5,128.20 = 1,110.30/x
  3. Step 3: Cross multiply
    3,418.80x = 5,128.20 × 1,110.30
  4. Step 4: Simplify right side
    3,418.80x = 5,693,840.46
  5. Step 5: Solve for x
    x = 5,693,840.46/3,418.80
  6. Step 6: Final answer
    x = 1,665.45

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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.