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Finding the Fourth Proportional to 1,611.96, 2,416.41 and 515.62

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Solution

The fourth proportional to 1,611.96, 2,416.41 and 515.62 is: 772.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.96 : 2,416.41 = 515.62 : x
  2. Step 2: Convert to fraction form
    1,611.96/2,416.41 = 515.62/x
  3. Step 3: Cross multiply
    1,611.96x = 2,416.41 × 515.62
  4. Step 4: Simplify right side
    1,611.96x = 1,245,949.32
  5. Step 5: Solve for x
    x = 1,245,949.32/1,611.96
  6. Step 6: Final answer
    x = 772.94

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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.