Home / 1,025.70-1,538.55-409.22

Finding the Fourth Proportional to 1,025.70, 1,538.55 and 409.22

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Solution

The fourth proportional to 1,025.70, 1,538.55 and 409.22 is: 613.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.70 : 1,538.55 = 409.22 : x
  2. Step 2: Convert to fraction form
    1,025.70/1,538.55 = 409.22/x
  3. Step 3: Cross multiply
    1,025.70x = 1,538.55 × 409.22
  4. Step 4: Simplify right side
    1,025.70x = 629,605.43
  5. Step 5: Solve for x
    x = 629,605.43/1,025.70
  6. Step 6: Final answer
    x = 613.83

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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.