Home / 2,274.24-3,138.57-1,389.90

Finding the Fourth Proportional to 2,274.24, 3,138.57 and 1,389.90

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Solution

The fourth proportional to 2,274.24, 3,138.57 and 1,389.90 is: 1,918.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.24 : 3,138.57 = 1,389.90 : x
  2. Step 2: Convert to fraction form
    2,274.24/3,138.57 = 1,389.90/x
  3. Step 3: Cross multiply
    2,274.24x = 3,138.57 × 1,389.90
  4. Step 4: Simplify right side
    2,274.24x = 4,362,298.44
  5. Step 5: Solve for x
    x = 4,362,298.44/2,274.24
  6. Step 6: Final answer
    x = 1,918.13

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1.5x scale

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.