Home / 1,929.60-2,662.20-1,231.38

Finding the Fourth Proportional to 1,929.60, 2,662.20 and 1,231.38

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Solution

The fourth proportional to 1,929.60, 2,662.20 and 1,231.38 is: 1,698.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.60 : 2,662.20 = 1,231.38 : x
  2. Step 2: Convert to fraction form
    1,929.60/2,662.20 = 1,231.38/x
  3. Step 3: Cross multiply
    1,929.60x = 2,662.20 × 1,231.38
  4. Step 4: Simplify right side
    1,929.60x = 3,278,179.84
  5. Step 5: Solve for x
    x = 3,278,179.84/1,929.60
  6. Step 6: Final answer
    x = 1,698.89

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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.