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Finding the Fourth Proportional to 3,404.82, 5,107.20 and 939.66

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Solution

The fourth proportional to 3,404.82, 5,107.20 and 939.66 is: 1,409.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,404.82 : 5,107.20 = 939.66 : x
  2. Step 2: Convert to fraction form
    3,404.82/5,107.20 = 939.66/x
  3. Step 3: Cross multiply
    3,404.82x = 5,107.20 × 939.66
  4. Step 4: Simplify right side
    3,404.82x = 4,799,031.55
  5. Step 5: Solve for x
    x = 4,799,031.55/3,404.82
  6. Step 6: Final answer
    x = 1,409.48

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1.5x scale

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.