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Finding the Fourth Proportional to 1,636.44, 2,453.50 and 770.28

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Solution

The fourth proportional to 1,636.44, 2,453.50 and 770.28 is: 1,154.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.44 : 2,453.50 = 770.28 : x
  2. Step 2: Convert to fraction form
    1,636.44/2,453.50 = 770.28/x
  3. Step 3: Cross multiply
    1,636.44x = 2,453.50 × 770.28
  4. Step 4: Simplify right side
    1,636.44x = 1,889,881.98
  5. Step 5: Solve for x
    x = 1,889,881.98/1,636.44
  6. Step 6: Final answer
    x = 1,154.87

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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.