Home / 3,145.60-4,338.75-1,819.09

Finding the Fourth Proportional to 3,145.60, 4,338.75 and 1,819.09

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Solution

The fourth proportional to 3,145.60, 4,338.75 and 1,819.09 is: 2,509.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.60 : 4,338.75 = 1,819.09 : x
  2. Step 2: Convert to fraction form
    3,145.60/4,338.75 = 1,819.09/x
  3. Step 3: Cross multiply
    3,145.60x = 4,338.75 × 1,819.09
  4. Step 4: Simplify right side
    3,145.60x = 7,892,576.74
  5. Step 5: Solve for x
    x = 7,892,576.74/3,145.60
  6. Step 6: Final answer
    x = 2,509.08

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Half scale
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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.