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Finding the Fourth Proportional to 1,235.76, 1,850.28 and 747.60

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Solution

The fourth proportional to 1,235.76, 1,850.28 and 747.60 is: 1,119.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.76 : 1,850.28 = 747.60 : x
  2. Step 2: Convert to fraction form
    1,235.76/1,850.28 = 747.60/x
  3. Step 3: Cross multiply
    1,235.76x = 1,850.28 × 747.60
  4. Step 4: Simplify right side
    1,235.76x = 1,383,269.33
  5. Step 5: Solve for x
    x = 1,383,269.33/1,235.76
  6. Step 6: Final answer
    x = 1,119.37

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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.