Home / 4,078.57-6,118.76-1,305.40

Finding the Fourth Proportional to 4,078.57, 6,118.76 and 1,305.40

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Solution

The fourth proportional to 4,078.57, 6,118.76 and 1,305.40 is: 1,958.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,078.57 : 6,118.76 = 1,305.40 : x
  2. Step 2: Convert to fraction form
    4,078.57/6,118.76 = 1,305.40/x
  3. Step 3: Cross multiply
    4,078.57x = 6,118.76 × 1,305.40
  4. Step 4: Simplify right side
    4,078.57x = 7,987,429.30
  5. Step 5: Solve for x
    x = 7,987,429.30/4,078.57
  6. Step 6: Final answer
    x = 1,958.39

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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.