Home / 1,515.85-2,273.54-419.99

Finding the Fourth Proportional to 1,515.85, 2,273.54 and 419.99

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Solution

The fourth proportional to 1,515.85, 2,273.54 and 419.99 is: 629.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.85 : 2,273.54 = 419.99 : x
  2. Step 2: Convert to fraction form
    1,515.85/2,273.54 = 419.99/x
  3. Step 3: Cross multiply
    1,515.85x = 2,273.54 × 419.99
  4. Step 4: Simplify right side
    1,515.85x = 954,850.60
  5. Step 5: Solve for x
    x = 954,850.60/1,515.85
  6. Step 6: Final answer
    x = 629.91

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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.