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Finding the Fourth Proportional to 3,186.76, 4,780.36 and 1,107

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Solution

The fourth proportional to 3,186.76, 4,780.36 and 1,107 is: 1,660.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.76 : 4,780.36 = 1,107 : x
  2. Step 2: Convert to fraction form
    3,186.76/4,780.36 = 1,107/x
  3. Step 3: Cross multiply
    3,186.76x = 4,780.36 × 1,107
  4. Step 4: Simplify right side
    3,186.76x = 5,291,858.52
  5. Step 5: Solve for x
    x = 5,291,858.52/3,186.76
  6. Step 6: Final answer
    x = 1,660.58

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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.