Home / 1,025.30-1,538.06-408.86

Finding the Fourth Proportional to 1,025.30, 1,538.06 and 408.86

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Solution

The fourth proportional to 1,025.30, 1,538.06 and 408.86 is: 613.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.30 : 1,538.06 = 408.86 : x
  2. Step 2: Convert to fraction form
    1,025.30/1,538.06 = 408.86/x
  3. Step 3: Cross multiply
    1,025.30x = 1,538.06 × 408.86
  4. Step 4: Simplify right side
    1,025.30x = 628,853.01
  5. Step 5: Solve for x
    x = 628,853.01/1,025.30
  6. Step 6: Final answer
    x = 613.33

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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.