Home / 1,188.08-1,782.27-408.23

Finding the Fourth Proportional to 1,188.08, 1,782.27 and 408.23

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Solution

The fourth proportional to 1,188.08, 1,782.27 and 408.23 is: 612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.08 : 1,782.27 = 408.23 : x
  2. Step 2: Convert to fraction form
    1,188.08/1,782.27 = 408.23/x
  3. Step 3: Cross multiply
    1,188.08x = 1,782.27 × 408.23
  4. Step 4: Simplify right side
    1,188.08x = 727,576.08
  5. Step 5: Solve for x
    x = 727,576.08/1,188.08
  6. Step 6: Final answer
    x = 612.40

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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.