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Finding the Fourth Proportional to 3,208.65, 4,812.15 and 1,260.87

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Solution

The fourth proportional to 3,208.65, 4,812.15 and 1,260.87 is: 1,890.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.65 : 4,812.15 = 1,260.87 : x
  2. Step 2: Convert to fraction form
    3,208.65/4,812.15 = 1,260.87/x
  3. Step 3: Cross multiply
    3,208.65x = 4,812.15 × 1,260.87
  4. Step 4: Simplify right side
    3,208.65x = 6,067,495.57
  5. Step 5: Solve for x
    x = 6,067,495.57/3,208.65
  6. Step 6: Final answer
    x = 1,890.98

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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.