Home / 386,015.12-579,022.92-105,511.28

Finding the Fourth Proportional to 386,015.12, 579,022.92 and 105,511.28

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Solution

The fourth proportional to 386,015.12, 579,022.92 and 105,511.28 is: 158,266.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,015.12 : 579,022.92 = 105,511.28 : x
  2. Step 2: Convert to fraction form
    386,015.12/579,022.92 = 105,511.28/x
  3. Step 3: Cross multiply
    386,015.12x = 579,022.92 × 105,511.28
  4. Step 4: Simplify right side
    386,015.12x = 61,093,449,438.54
  5. Step 5: Solve for x
    x = 61,093,449,438.54/386,015.12
  6. Step 6: Final answer
    x = 158,266.99

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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.