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Finding the Fourth Proportional to 2,628.75, 3,941.85 and 939.58

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Solution

The fourth proportional to 2,628.75, 3,941.85 and 939.58 is: 1,408.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.75 : 3,941.85 = 939.58 : x
  2. Step 2: Convert to fraction form
    2,628.75/3,941.85 = 939.58/x
  3. Step 3: Cross multiply
    2,628.75x = 3,941.85 × 939.58
  4. Step 4: Simplify right side
    2,628.75x = 3,703,683.42
  5. Step 5: Solve for x
    x = 3,703,683.42/2,628.75
  6. Step 6: Final answer
    x = 1,408.91

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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.