Home / 1,274.08-1,911.26-408.16

Finding the Fourth Proportional to 1,274.08, 1,911.26 and 408.16

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Solution

The fourth proportional to 1,274.08, 1,911.26 and 408.16 is: 612.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.08 : 1,911.26 = 408.16 : x
  2. Step 2: Convert to fraction form
    1,274.08/1,911.26 = 408.16/x
  3. Step 3: Cross multiply
    1,274.08x = 1,911.26 × 408.16
  4. Step 4: Simplify right side
    1,274.08x = 780,099.88
  5. Step 5: Solve for x
    x = 780,099.88/1,274.08
  6. Step 6: Final answer
    x = 612.28

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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.