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Finding the Fourth Proportional to 3,941.25, 5,911.71 and 979.70

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Solution

The fourth proportional to 3,941.25, 5,911.71 and 979.70 is: 1,469.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,941.25 : 5,911.71 = 979.70 : x
  2. Step 2: Convert to fraction form
    3,941.25/5,911.71 = 979.70/x
  3. Step 3: Cross multiply
    3,941.25x = 5,911.71 × 979.70
  4. Step 4: Simplify right side
    3,941.25x = 5,791,672.73
  5. Step 5: Solve for x
    x = 5,791,672.73/3,941.25
  6. Step 6: Final answer
    x = 1,469.50

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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.