Home / 2,178.25-3,006.39-1,246.75

Finding the Fourth Proportional to 2,178.25, 3,006.39 and 1,246.75

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Solution

The fourth proportional to 2,178.25, 3,006.39 and 1,246.75 is: 1,720.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.25 : 3,006.39 = 1,246.75 : x
  2. Step 2: Convert to fraction form
    2,178.25/3,006.39 = 1,246.75/x
  3. Step 3: Cross multiply
    2,178.25x = 3,006.39 × 1,246.75
  4. Step 4: Simplify right side
    2,178.25x = 3,748,216.73
  5. Step 5: Solve for x
    x = 3,748,216.73/2,178.25
  6. Step 6: Final answer
    x = 1,720.75

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Half scale
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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.