Home / 2,274.06-3,138.72-1,389.66

Finding the Fourth Proportional to 2,274.06, 3,138.72 and 1,389.66

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Solution

The fourth proportional to 2,274.06, 3,138.72 and 1,389.66 is: 1,918.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.06 : 3,138.72 = 1,389.66 : x
  2. Step 2: Convert to fraction form
    2,274.06/3,138.72 = 1,389.66/x
  3. Step 3: Cross multiply
    2,274.06x = 3,138.72 × 1,389.66
  4. Step 4: Simplify right side
    2,274.06x = 4,361,753.64
  5. Step 5: Solve for x
    x = 4,361,753.64/2,274.06
  6. Step 6: Final answer
    x = 1,918.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.