Home / 1,344.15-2,015.19-419.18

Finding the Fourth Proportional to 1,344.15, 2,015.19 and 419.18

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Solution

The fourth proportional to 1,344.15, 2,015.19 and 419.18 is: 628.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.15 : 2,015.19 = 419.18 : x
  2. Step 2: Convert to fraction form
    1,344.15/2,015.19 = 419.18/x
  3. Step 3: Cross multiply
    1,344.15x = 2,015.19 × 419.18
  4. Step 4: Simplify right side
    1,344.15x = 844,717.27
  5. Step 5: Solve for x
    x = 844,717.27/1,344.15
  6. Step 6: Final answer
    x = 628.44

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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.