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Finding the Fourth Proportional to 2,636.85, 3,954.19 and 992.52

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Solution

The fourth proportional to 2,636.85, 3,954.19 and 992.52 is: 1,488.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.85 : 3,954.19 = 992.52 : x
  2. Step 2: Convert to fraction form
    2,636.85/3,954.19 = 992.52/x
  3. Step 3: Cross multiply
    2,636.85x = 3,954.19 × 992.52
  4. Step 4: Simplify right side
    2,636.85x = 3,924,612.66
  5. Step 5: Solve for x
    x = 3,924,612.66/2,636.85
  6. Step 6: Final answer
    x = 1,488.37

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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.