Home / 1,515.15-2,272.68-419.58

Finding the Fourth Proportional to 1,515.15, 2,272.68 and 419.58

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Solution

The fourth proportional to 1,515.15, 2,272.68 and 419.58 is: 629.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.15 : 2,272.68 = 419.58 : x
  2. Step 2: Convert to fraction form
    1,515.15/2,272.68 = 419.58/x
  3. Step 3: Cross multiply
    1,515.15x = 2,272.68 × 419.58
  4. Step 4: Simplify right side
    1,515.15x = 953,571.07
  5. Step 5: Solve for x
    x = 953,571.07/1,515.15
  6. Step 6: Final answer
    x = 629.36

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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.