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Finding the Fourth Proportional to 1,770.69, 2,655.21 and 674.37

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Solution

The fourth proportional to 1,770.69, 2,655.21 and 674.37 is: 1,011.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.69 : 2,655.21 = 674.37 : x
  2. Step 2: Convert to fraction form
    1,770.69/2,655.21 = 674.37/x
  3. Step 3: Cross multiply
    1,770.69x = 2,655.21 × 674.37
  4. Step 4: Simplify right side
    1,770.69x = 1,790,593.97
  5. Step 5: Solve for x
    x = 1,790,593.97/1,770.69
  6. Step 6: Final answer
    x = 1,011.24

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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.