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Finding the Fourth Proportional to 3,770.65, 5,653.50 and 1,687.80

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Solution

The fourth proportional to 3,770.65, 5,653.50 and 1,687.80 is: 2,530.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,770.65 : 5,653.50 = 1,687.80 : x
  2. Step 2: Convert to fraction form
    3,770.65/5,653.50 = 1,687.80/x
  3. Step 3: Cross multiply
    3,770.65x = 5,653.50 × 1,687.80
  4. Step 4: Simplify right side
    3,770.65x = 9,541,992.17
  5. Step 5: Solve for x
    x = 9,541,992.17/3,770.65
  6. Step 6: Final answer
    x = 2,530.60

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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.