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Finding the Fourth Proportional to 3,992.62, 5,988.96 and 1,219.72

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Solution

The fourth proportional to 3,992.62, 5,988.96 and 1,219.72 is: 1,829.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.62 : 5,988.96 = 1,219.72 : x
  2. Step 2: Convert to fraction form
    3,992.62/5,988.96 = 1,219.72/x
  3. Step 3: Cross multiply
    3,992.62x = 5,988.96 × 1,219.72
  4. Step 4: Simplify right side
    3,992.62x = 7,304,854.29
  5. Step 5: Solve for x
    x = 7,304,854.29/3,992.62
  6. Step 6: Final answer
    x = 1,829.59

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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.