Home / 2,274.37-3,138.64-1,390.16

Finding the Fourth Proportional to 2,274.37, 3,138.64 and 1,390.16

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Solution

The fourth proportional to 2,274.37, 3,138.64 and 1,390.16 is: 1,918.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.37 : 3,138.64 = 1,390.16 : x
  2. Step 2: Convert to fraction form
    2,274.37/3,138.64 = 1,390.16/x
  3. Step 3: Cross multiply
    2,274.37x = 3,138.64 × 1,390.16
  4. Step 4: Simplify right side
    2,274.37x = 4,363,216.15
  5. Step 5: Solve for x
    x = 4,363,216.15/2,274.37
  6. Step 6: Final answer
    x = 1,918.43

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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.