Home / 2,179.20-3,009.00-1,340.30

Finding the Fourth Proportional to 2,179.20, 3,009.00 and 1,340.30

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Solution

The fourth proportional to 2,179.20, 3,009.00 and 1,340.30 is: 1,850.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.20 : 3,009.00 = 1,340.30 : x
  2. Step 2: Convert to fraction form
    2,179.20/3,009.00 = 1,340.30/x
  3. Step 3: Cross multiply
    2,179.20x = 3,009.00 × 1,340.30
  4. Step 4: Simplify right side
    2,179.20x = 4,032,950.78
  5. Step 5: Solve for x
    x = 4,032,950.78/2,179.20
  6. Step 6: Final answer
    x = 1,850.65

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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.