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Finding the Fourth Proportional to 3,768.88, 5,651.52 and 1,688.90

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Solution

The fourth proportional to 3,768.88, 5,651.52 and 1,688.90 is: 2,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,768.88 : 5,651.52 = 1,688.90 : x
  2. Step 2: Convert to fraction form
    3,768.88/5,651.52 = 1,688.90/x
  3. Step 3: Cross multiply
    3,768.88x = 5,651.52 × 1,688.90
  4. Step 4: Simplify right side
    3,768.88x = 9,544,866.26
  5. Step 5: Solve for x
    x = 9,544,866.26/3,768.88
  6. Step 6: Final answer
    x = 2,532.55

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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.