Home / 2,274.19-3,138.62-1,390.58

Finding the Fourth Proportional to 2,274.19, 3,138.62 and 1,390.58

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Solution

The fourth proportional to 2,274.19, 3,138.62 and 1,390.58 is: 1,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.19 : 3,138.62 = 1,390.58 : x
  2. Step 2: Convert to fraction form
    2,274.19/3,138.62 = 1,390.58/x
  3. Step 3: Cross multiply
    2,274.19x = 3,138.62 × 1,390.58
  4. Step 4: Simplify right side
    2,274.19x = 4,364,520.71
  5. Step 5: Solve for x
    x = 4,364,520.71/2,274.19
  6. Step 6: Final answer
    x = 1,919.15

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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.