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Finding the Fourth Proportional to 3,391.47, 5,086.39 and 926.30

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Solution

The fourth proportional to 3,391.47, 5,086.39 and 926.30 is: 1,389.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.47 : 5,086.39 = 926.30 : x
  2. Step 2: Convert to fraction form
    3,391.47/5,086.39 = 926.30/x
  3. Step 3: Cross multiply
    3,391.47x = 5,086.39 × 926.30
  4. Step 4: Simplify right side
    3,391.47x = 4,711,544.73
  5. Step 5: Solve for x
    x = 4,711,544.73/3,391.47
  6. Step 6: Final answer
    x = 1,389.23

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Similar ratio
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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.