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Finding the Fourth Proportional to 1,245.53, 1,865.86 and 757.37

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Solution

The fourth proportional to 1,245.53, 1,865.86 and 757.37 is: 1,134.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.53 : 1,865.86 = 757.37 : x
  2. Step 2: Convert to fraction form
    1,245.53/1,865.86 = 757.37/x
  3. Step 3: Cross multiply
    1,245.53x = 1,865.86 × 757.37
  4. Step 4: Simplify right side
    1,245.53x = 1,413,133.27
  5. Step 5: Solve for x
    x = 1,413,133.27/1,245.53
  6. Step 6: Final answer
    x = 1,134.57

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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.