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Finding the Fourth Proportional to 3,769.80, 5,654.70 and 996.90

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Solution

The fourth proportional to 3,769.80, 5,654.70 and 996.90 is: 1,495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,769.80 : 5,654.70 = 996.90 : x
  2. Step 2: Convert to fraction form
    3,769.80/5,654.70 = 996.90/x
  3. Step 3: Cross multiply
    3,769.80x = 5,654.70 × 996.90
  4. Step 4: Simplify right side
    3,769.80x = 5,637,170.43
  5. Step 5: Solve for x
    x = 5,637,170.43/3,769.80
  6. Step 6: Final answer
    x = 1,495.35

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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.