Home / 1,344.30-2,016.47-419.79

Finding the Fourth Proportional to 1,344.30, 2,016.47 and 419.79

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Solution

The fourth proportional to 1,344.30, 2,016.47 and 419.79 is: 629.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.30 : 2,016.47 = 419.79 : x
  2. Step 2: Convert to fraction form
    1,344.30/2,016.47 = 419.79/x
  3. Step 3: Cross multiply
    1,344.30x = 2,016.47 × 419.79
  4. Step 4: Simplify right side
    1,344.30x = 846,491.84
  5. Step 5: Solve for x
    x = 846,491.84/1,344.30
  6. Step 6: Final answer
    x = 629.69

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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.