Home / 1,519.49-2,279.36-423.86

Finding the Fourth Proportional to 1,519.49, 2,279.36 and 423.86

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Solution

The fourth proportional to 1,519.49, 2,279.36 and 423.86 is: 635.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.49 : 2,279.36 = 423.86 : x
  2. Step 2: Convert to fraction form
    1,519.49/2,279.36 = 423.86/x
  3. Step 3: Cross multiply
    1,519.49x = 2,279.36 × 423.86
  4. Step 4: Simplify right side
    1,519.49x = 966,129.53
  5. Step 5: Solve for x
    x = 966,129.53/1,519.49
  6. Step 6: Final answer
    x = 635.82

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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.