Home / 2,274.08-3,138.76-1,390.62

Finding the Fourth Proportional to 2,274.08, 3,138.76 and 1,390.62

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Solution

The fourth proportional to 2,274.08, 3,138.76 and 1,390.62 is: 1,919.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.08 : 3,138.76 = 1,390.62 : x
  2. Step 2: Convert to fraction form
    2,274.08/3,138.76 = 1,390.62/x
  3. Step 3: Cross multiply
    2,274.08x = 3,138.76 × 1,390.62
  4. Step 4: Simplify right side
    2,274.08x = 4,364,822.43
  5. Step 5: Solve for x
    x = 4,364,822.43/2,274.08
  6. Step 6: Final answer
    x = 1,919.38

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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.