Home / 1,515.22-2,272.83-419.59

Finding the Fourth Proportional to 1,515.22, 2,272.83 and 419.59

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Solution

The fourth proportional to 1,515.22, 2,272.83 and 419.59 is: 629.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.22 : 2,272.83 = 419.59 : x
  2. Step 2: Convert to fraction form
    1,515.22/2,272.83 = 419.59/x
  3. Step 3: Cross multiply
    1,515.22x = 2,272.83 × 419.59
  4. Step 4: Simplify right side
    1,515.22x = 953,656.74
  5. Step 5: Solve for x
    x = 953,656.74/1,515.22
  6. Step 6: Final answer
    x = 629.39

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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.