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Finding the Fourth Proportional to 762.56, 1,137.14 and 755.63

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Solution

The fourth proportional to 762.56, 1,137.14 and 755.63 is: 1,126.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.56 : 1,137.14 = 755.63 : x
  2. Step 2: Convert to fraction form
    762.56/1,137.14 = 755.63/x
  3. Step 3: Cross multiply
    762.56x = 1,137.14 × 755.63
  4. Step 4: Simplify right side
    762.56x = 859,257.10
  5. Step 5: Solve for x
    x = 859,257.10/762.56
  6. Step 6: Final answer
    x = 1,126.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.