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Finding the Fourth Proportional to 4,786.38, 7,179.93 and 1,276.47

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Solution

The fourth proportional to 4,786.38, 7,179.93 and 1,276.47 is: 1,914.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,786.38 : 7,179.93 = 1,276.47 : x
  2. Step 2: Convert to fraction form
    4,786.38/7,179.93 = 1,276.47/x
  3. Step 3: Cross multiply
    4,786.38x = 7,179.93 × 1,276.47
  4. Step 4: Simplify right side
    4,786.38x = 9,164,965.25
  5. Step 5: Solve for x
    x = 9,164,965.25/4,786.38
  6. Step 6: Final answer
    x = 1,914.80

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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.