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Finding the Fourth Proportional to 2,991.84, 4,487.52 and 1,260.48

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Solution

The fourth proportional to 2,991.84, 4,487.52 and 1,260.48 is: 1,890.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.84 : 4,487.52 = 1,260.48 : x
  2. Step 2: Convert to fraction form
    2,991.84/4,487.52 = 1,260.48/x
  3. Step 3: Cross multiply
    2,991.84x = 4,487.52 × 1,260.48
  4. Step 4: Simplify right side
    2,991.84x = 5,656,429.21
  5. Step 5: Solve for x
    x = 5,656,429.21/2,991.84
  6. Step 6: Final answer
    x = 1,890.62

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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.