Home / 1,615.38-2,421.82-519.09

Finding the Fourth Proportional to 1,615.38, 2,421.82 and 519.09

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Solution

The fourth proportional to 1,615.38, 2,421.82 and 519.09 is: 778.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.38 : 2,421.82 = 519.09 : x
  2. Step 2: Convert to fraction form
    1,615.38/2,421.82 = 519.09/x
  3. Step 3: Cross multiply
    1,615.38x = 2,421.82 × 519.09
  4. Step 4: Simplify right side
    1,615.38x = 1,257,142.54
  5. Step 5: Solve for x
    x = 1,257,142.54/1,615.38
  6. Step 6: Final answer
    x = 778.23

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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.