Home / 2,678.20-4,016.40-946.42

Finding the Fourth Proportional to 2,678.20, 4,016.40 and 946.42

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Solution

The fourth proportional to 2,678.20, 4,016.40 and 946.42 is: 1,419.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.20 : 4,016.40 = 946.42 : x
  2. Step 2: Convert to fraction form
    2,678.20/4,016.40 = 946.42/x
  3. Step 3: Cross multiply
    2,678.20x = 4,016.40 × 946.42
  4. Step 4: Simplify right side
    2,678.20x = 3,801,201.29
  5. Step 5: Solve for x
    x = 3,801,201.29/2,678.20
  6. Step 6: Final answer
    x = 1,419.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.