Home / 1,515.39-2,273.09-419.76

Finding the Fourth Proportional to 1,515.39, 2,273.09 and 419.76

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Solution

The fourth proportional to 1,515.39, 2,273.09 and 419.76 is: 629.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.39 : 2,273.09 = 419.76 : x
  2. Step 2: Convert to fraction form
    1,515.39/2,273.09 = 419.76/x
  3. Step 3: Cross multiply
    1,515.39x = 2,273.09 × 419.76
  4. Step 4: Simplify right side
    1,515.39x = 954,152.26
  5. Step 5: Solve for x
    x = 954,152.26/1,515.39
  6. Step 6: Final answer
    x = 629.64

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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.