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Finding the Fourth Proportional to 2,611.98, 3,917.92 and 637.62

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Solution

The fourth proportional to 2,611.98, 3,917.92 and 637.62 is: 956.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.98 : 3,917.92 = 637.62 : x
  2. Step 2: Convert to fraction form
    2,611.98/3,917.92 = 637.62/x
  3. Step 3: Cross multiply
    2,611.98x = 3,917.92 × 637.62
  4. Step 4: Simplify right side
    2,611.98x = 2,498,138.70
  5. Step 5: Solve for x
    x = 2,498,138.70/2,611.98
  6. Step 6: Final answer
    x = 956.41

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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.