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Finding the Fourth Proportional to 4,611.72, 6,918.66 and 1,690.68

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Solution

The fourth proportional to 4,611.72, 6,918.66 and 1,690.68 is: 2,536.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,611.72 : 6,918.66 = 1,690.68 : x
  2. Step 2: Convert to fraction form
    4,611.72/6,918.66 = 1,690.68/x
  3. Step 3: Cross multiply
    4,611.72x = 6,918.66 × 1,690.68
  4. Step 4: Simplify right side
    4,611.72x = 11,697,240.09
  5. Step 5: Solve for x
    x = 11,697,240.09/4,611.72
  6. Step 6: Final answer
    x = 2,536.42

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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.