Home / 3,319.38-4,979.61-1,128.06

Finding the Fourth Proportional to 3,319.38, 4,979.61 and 1,128.06

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Solution

The fourth proportional to 3,319.38, 4,979.61 and 1,128.06 is: 1,692.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.38 : 4,979.61 = 1,128.06 : x
  2. Step 2: Convert to fraction form
    3,319.38/4,979.61 = 1,128.06/x
  3. Step 3: Cross multiply
    3,319.38x = 4,979.61 × 1,128.06
  4. Step 4: Simplify right side
    3,319.38x = 5,617,298.86
  5. Step 5: Solve for x
    x = 5,617,298.86/3,319.38
  6. Step 6: Final answer
    x = 1,692.27

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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.