Home / 1,420.13-2,131.48-727.27

Finding the Fourth Proportional to 1,420.13, 2,131.48 and 727.27

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Solution

The fourth proportional to 1,420.13, 2,131.48 and 727.27 is: 1,091.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.13 : 2,131.48 = 727.27 : x
  2. Step 2: Convert to fraction form
    1,420.13/2,131.48 = 727.27/x
  3. Step 3: Cross multiply
    1,420.13x = 2,131.48 × 727.27
  4. Step 4: Simplify right side
    1,420.13x = 1,550,161.46
  5. Step 5: Solve for x
    x = 1,550,161.46/1,420.13
  6. Step 6: Final answer
    x = 1,091.57

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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.