Home / 1,515.23-2,272.90-419.60

Finding the Fourth Proportional to 1,515.23, 2,272.90 and 419.60

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Solution

The fourth proportional to 1,515.23, 2,272.90 and 419.60 is: 629.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.23 : 2,272.90 = 419.60 : x
  2. Step 2: Convert to fraction form
    1,515.23/2,272.90 = 419.60/x
  3. Step 3: Cross multiply
    1,515.23x = 2,272.90 × 419.60
  4. Step 4: Simplify right side
    1,515.23x = 953,696.43
  5. Step 5: Solve for x
    x = 953,696.43/1,515.23
  6. Step 6: Final answer
    x = 629.41

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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.