Home / 2,178.62-3,005.67-1,338.65

Finding the Fourth Proportional to 2,178.62, 3,005.67 and 1,338.65

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Solution

The fourth proportional to 2,178.62, 3,005.67 and 1,338.65 is: 1,846.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.62 : 3,005.67 = 1,338.65 : x
  2. Step 2: Convert to fraction form
    2,178.62/3,005.67 = 1,338.65/x
  3. Step 3: Cross multiply
    2,178.62x = 3,005.67 × 1,338.65
  4. Step 4: Simplify right side
    2,178.62x = 4,023,525.12
  5. Step 5: Solve for x
    x = 4,023,525.12/2,178.62
  6. Step 6: Final answer
    x = 1,846.83

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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.