Home / 2,179.08-3,005.78-1,340.20

Finding the Fourth Proportional to 2,179.08, 3,005.78 and 1,340.20

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Solution

The fourth proportional to 2,179.08, 3,005.78 and 1,340.20 is: 1,848.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.08 : 3,005.78 = 1,340.20 : x
  2. Step 2: Convert to fraction form
    2,179.08/3,005.78 = 1,340.20/x
  3. Step 3: Cross multiply
    2,179.08x = 3,005.78 × 1,340.20
  4. Step 4: Simplify right side
    2,179.08x = 4,028,346.36
  5. Step 5: Solve for x
    x = 4,028,346.36/2,179.08
  6. Step 6: Final answer
    x = 1,848.65

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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.