Home / 2,590.38-3,883.68-1,128.60

Finding the Fourth Proportional to 2,590.38, 3,883.68 and 1,128.60

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Solution

The fourth proportional to 2,590.38, 3,883.68 and 1,128.60 is: 1,692.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.38 : 3,883.68 = 1,128.60 : x
  2. Step 2: Convert to fraction form
    2,590.38/3,883.68 = 1,128.60/x
  3. Step 3: Cross multiply
    2,590.38x = 3,883.68 × 1,128.60
  4. Step 4: Simplify right side
    2,590.38x = 4,383,121.25
  5. Step 5: Solve for x
    x = 4,383,121.25/2,590.38
  6. Step 6: Final answer
    x = 1,692.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.