Home / 1,405.71-2,108.79-1,059.75

Finding the Fourth Proportional to 1,405.71, 2,108.79 and 1,059.75

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Solution

The fourth proportional to 1,405.71, 2,108.79 and 1,059.75 is: 1,589.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.71 : 2,108.79 = 1,059.75 : x
  2. Step 2: Convert to fraction form
    1,405.71/2,108.79 = 1,059.75/x
  3. Step 3: Cross multiply
    1,405.71x = 2,108.79 × 1,059.75
  4. Step 4: Simplify right side
    1,405.71x = 2,234,790.20
  5. Step 5: Solve for x
    x = 2,234,790.20/1,405.71
  6. Step 6: Final answer
    x = 1,589.79

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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.