Home / 1,519.20-2,278.81-423.57

Finding the Fourth Proportional to 1,519.20, 2,278.81 and 423.57

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Solution

The fourth proportional to 1,519.20, 2,278.81 and 423.57 is: 635.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.20 : 2,278.81 = 423.57 : x
  2. Step 2: Convert to fraction form
    1,519.20/2,278.81 = 423.57/x
  3. Step 3: Cross multiply
    1,519.20x = 2,278.81 × 423.57
  4. Step 4: Simplify right side
    1,519.20x = 965,236.81
  5. Step 5: Solve for x
    x = 965,236.81/1,519.20
  6. Step 6: Final answer
    x = 635.36

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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.