Home / 1,515.50-2,272.99-419.57

Finding the Fourth Proportional to 1,515.50, 2,272.99 and 419.57

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Solution

The fourth proportional to 1,515.50, 2,272.99 and 419.57 is: 629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.50 : 2,272.99 = 419.57 : x
  2. Step 2: Convert to fraction form
    1,515.50/2,272.99 = 419.57/x
  3. Step 3: Cross multiply
    1,515.50x = 2,272.99 × 419.57
  4. Step 4: Simplify right side
    1,515.50x = 953,678.41
  5. Step 5: Solve for x
    x = 953,678.41/1,515.50
  6. Step 6: Final answer
    x = 629.28

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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.