Home / 1,419.27-2,130.87-726.48

Finding the Fourth Proportional to 1,419.27, 2,130.87 and 726.48

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Solution

The fourth proportional to 1,419.27, 2,130.87 and 726.48 is: 1,090.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.27 : 2,130.87 = 726.48 : x
  2. Step 2: Convert to fraction form
    1,419.27/2,130.87 = 726.48/x
  3. Step 3: Cross multiply
    1,419.27x = 2,130.87 × 726.48
  4. Step 4: Simplify right side
    1,419.27x = 1,548,034.44
  5. Step 5: Solve for x
    x = 1,548,034.44/1,419.27
  6. Step 6: Final answer
    x = 1,090.73

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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.