Home / 2,335.38-3,221.40-1,390.54

Finding the Fourth Proportional to 2,335.38, 3,221.40 and 1,390.54

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Solution

The fourth proportional to 2,335.38, 3,221.40 and 1,390.54 is: 1,918.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,335.38 : 3,221.40 = 1,390.54 : x
  2. Step 2: Convert to fraction form
    2,335.38/3,221.40 = 1,390.54/x
  3. Step 3: Cross multiply
    2,335.38x = 3,221.40 × 1,390.54
  4. Step 4: Simplify right side
    2,335.38x = 4,479,469.45
  5. Step 5: Solve for x
    x = 4,479,469.45/2,335.38
  6. Step 6: Final answer
    x = 1,918.09

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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.