Home / 1,190.27-1,642.34-748.80

Finding the Fourth Proportional to 1,190.27, 1,642.34 and 748.80

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Solution

The fourth proportional to 1,190.27, 1,642.34 and 748.80 is: 1,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.27 : 1,642.34 = 748.80 : x
  2. Step 2: Convert to fraction form
    1,190.27/1,642.34 = 748.80/x
  3. Step 3: Cross multiply
    1,190.27x = 1,642.34 × 748.80
  4. Step 4: Simplify right side
    1,190.27x = 1,229,786.06
  5. Step 5: Solve for x
    x = 1,229,786.06/1,190.27
  6. Step 6: Final answer
    x = 1,033.20

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1.5x scale

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.