Home / 3,078.39-4,248.68-1,958.16

Finding the Fourth Proportional to 3,078.39, 4,248.68 and 1,958.16

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Solution

The fourth proportional to 3,078.39, 4,248.68 and 1,958.16 is: 2,702.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.39 : 4,248.68 = 1,958.16 : x
  2. Step 2: Convert to fraction form
    3,078.39/4,248.68 = 1,958.16/x
  3. Step 3: Cross multiply
    3,078.39x = 4,248.68 × 1,958.16
  4. Step 4: Simplify right side
    3,078.39x = 8,319,601.37
  5. Step 5: Solve for x
    x = 8,319,601.37/3,078.39
  6. Step 6: Final answer
    x = 2,702.58

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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.