Home / 1,515.29-2,272.91-419.61

Finding the Fourth Proportional to 1,515.29, 2,272.91 and 419.61

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Solution

The fourth proportional to 1,515.29, 2,272.91 and 419.61 is: 629.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.29 : 2,272.91 = 419.61 : x
  2. Step 2: Convert to fraction form
    1,515.29/2,272.91 = 419.61/x
  3. Step 3: Cross multiply
    1,515.29x = 2,272.91 × 419.61
  4. Step 4: Simplify right side
    1,515.29x = 953,736.81
  5. Step 5: Solve for x
    x = 953,736.81/1,515.29
  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.