Home / 2,178.68-3,005.82-1,393.20

Finding the Fourth Proportional to 2,178.68, 3,005.82 and 1,393.20

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Solution

The fourth proportional to 2,178.68, 3,005.82 and 1,393.20 is: 1,922.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.68 : 3,005.82 = 1,393.20 : x
  2. Step 2: Convert to fraction form
    2,178.68/3,005.82 = 1,393.20/x
  3. Step 3: Cross multiply
    2,178.68x = 3,005.82 × 1,393.20
  4. Step 4: Simplify right side
    2,178.68x = 4,187,708.42
  5. Step 5: Solve for x
    x = 4,187,708.42/2,178.68
  6. Step 6: Final answer
    x = 1,922.14

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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.