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Finding the Fourth Proportional to 3,611.64, 5,424.66 and 3,407.88

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Solution

The fourth proportional to 3,611.64, 5,424.66 and 3,407.88 is: 5,118.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.64 : 5,424.66 = 3,407.88 : x
  2. Step 2: Convert to fraction form
    3,611.64/5,424.66 = 3,407.88/x
  3. Step 3: Cross multiply
    3,611.64x = 5,424.66 × 3,407.88
  4. Step 4: Simplify right side
    3,611.64x = 18,486,590.32
  5. Step 5: Solve for x
    x = 18,486,590.32/3,611.64
  6. Step 6: Final answer
    x = 5,118.61

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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.