Home / 1,344.40-2,015.85-419.58

Finding the Fourth Proportional to 1,344.40, 2,015.85 and 419.58

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Solution

The fourth proportional to 1,344.40, 2,015.85 and 419.58 is: 629.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.40 : 2,015.85 = 419.58 : x
  2. Step 2: Convert to fraction form
    1,344.40/2,015.85 = 419.58/x
  3. Step 3: Cross multiply
    1,344.40x = 2,015.85 × 419.58
  4. Step 4: Simplify right side
    1,344.40x = 845,811.92
  5. Step 5: Solve for x
    x = 845,811.92/1,344.40
  6. Step 6: Final answer
    x = 629.14

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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.