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Finding the Fourth Proportional to 4,786.74, 7,180.20 and 1,323.90

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Solution

The fourth proportional to 4,786.74, 7,180.20 and 1,323.90 is: 1,985.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,786.74 : 7,180.20 = 1,323.90 : x
  2. Step 2: Convert to fraction form
    4,786.74/7,180.20 = 1,323.90/x
  3. Step 3: Cross multiply
    4,786.74x = 7,180.20 × 1,323.90
  4. Step 4: Simplify right side
    4,786.74x = 9,505,866.78
  5. Step 5: Solve for x
    x = 9,505,866.78/4,786.74
  6. Step 6: Final answer
    x = 1,985.87

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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.