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Finding the Fourth Proportional to 3,404.50, 5,106.75 and 939.34

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Solution

The fourth proportional to 3,404.50, 5,106.75 and 939.34 is: 1,409.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,404.50 : 5,106.75 = 939.34 : x
  2. Step 2: Convert to fraction form
    3,404.50/5,106.75 = 939.34/x
  3. Step 3: Cross multiply
    3,404.50x = 5,106.75 × 939.34
  4. Step 4: Simplify right side
    3,404.50x = 4,796,974.55
  5. Step 5: Solve for x
    x = 4,796,974.55/3,404.50
  6. Step 6: Final answer
    x = 1,409.01

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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.