Home / 1,419.19-2,129.16-494.80

Finding the Fourth Proportional to 1,419.19, 2,129.16 and 494.80

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Solution

The fourth proportional to 1,419.19, 2,129.16 and 494.80 is: 742.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.19 : 2,129.16 = 494.80 : x
  2. Step 2: Convert to fraction form
    1,419.19/2,129.16 = 494.80/x
  3. Step 3: Cross multiply
    1,419.19x = 2,129.16 × 494.80
  4. Step 4: Simplify right side
    1,419.19x = 1,053,497.72
  5. Step 5: Solve for x
    x = 1,053,497.72/1,419.19
  6. Step 6: Final answer
    x = 742.33

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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.