Home / 1,247.27-1,720.36-1,072.31

Finding the Fourth Proportional to 1,247.27, 1,720.36 and 1,072.31

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Solution

The fourth proportional to 1,247.27, 1,720.36 and 1,072.31 is: 1,479.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.27 : 1,720.36 = 1,072.31 : x
  2. Step 2: Convert to fraction form
    1,247.27/1,720.36 = 1,072.31/x
  3. Step 3: Cross multiply
    1,247.27x = 1,720.36 × 1,072.31
  4. Step 4: Simplify right side
    1,247.27x = 1,844,760.85
  5. Step 5: Solve for x
    x = 1,844,760.85/1,247.27
  6. Step 6: Final answer
    x = 1,479.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.