Home / 3,145.90-4,340.37-1,819.12

Finding the Fourth Proportional to 3,145.90, 4,340.37 and 1,819.12

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Solution

The fourth proportional to 3,145.90, 4,340.37 and 1,819.12 is: 2,509.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.90 : 4,340.37 = 1,819.12 : x
  2. Step 2: Convert to fraction form
    3,145.90/4,340.37 = 1,819.12/x
  3. Step 3: Cross multiply
    3,145.90x = 4,340.37 × 1,819.12
  4. Step 4: Simplify right side
    3,145.90x = 7,895,653.87
  5. Step 5: Solve for x
    x = 7,895,653.87/3,145.90
  6. Step 6: Final answer
    x = 2,509.82

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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.