Home / 1,025.39-1,538.26-409.12

Finding the Fourth Proportional to 1,025.39, 1,538.26 and 409.12

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Solution

The fourth proportional to 1,025.39, 1,538.26 and 409.12 is: 613.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.39 : 1,538.26 = 409.12 : x
  2. Step 2: Convert to fraction form
    1,025.39/1,538.26 = 409.12/x
  3. Step 3: Cross multiply
    1,025.39x = 1,538.26 × 409.12
  4. Step 4: Simplify right side
    1,025.39x = 629,328.06
  5. Step 5: Solve for x
    x = 629,328.06/1,025.39
  6. Step 6: Final answer
    x = 613.74

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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.