Home / 1,391.02-2,086.26-611.26

Finding the Fourth Proportional to 1,391.02, 2,086.26 and 611.26

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Solution

The fourth proportional to 1,391.02, 2,086.26 and 611.26 is: 916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.02 : 2,086.26 = 611.26 : x
  2. Step 2: Convert to fraction form
    1,391.02/2,086.26 = 611.26/x
  3. Step 3: Cross multiply
    1,391.02x = 2,086.26 × 611.26
  4. Step 4: Simplify right side
    1,391.02x = 1,275,247.29
  5. Step 5: Solve for x
    x = 1,275,247.29/1,391.02
  6. Step 6: Final answer
    x = 916.77

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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.