Home / 1,515.16-2,272.46-419.61

Finding the Fourth Proportional to 1,515.16, 2,272.46 and 419.61

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Solution

The fourth proportional to 1,515.16, 2,272.46 and 419.61 is: 629.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.16 : 2,272.46 = 419.61 : x
  2. Step 2: Convert to fraction form
    1,515.16/2,272.46 = 419.61/x
  3. Step 3: Cross multiply
    1,515.16x = 2,272.46 × 419.61
  4. Step 4: Simplify right side
    1,515.16x = 953,537.73
  5. Step 5: Solve for x
    x = 953,537.73/1,515.16
  6. Step 6: Final answer
    x = 629.33

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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.