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Finding the Fourth Proportional to 1,027.28, 1,537.72 and 738.64

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Solution

The fourth proportional to 1,027.28, 1,537.72 and 738.64 is: 1,105.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.28 : 1,537.72 = 738.64 : x
  2. Step 2: Convert to fraction form
    1,027.28/1,537.72 = 738.64/x
  3. Step 3: Cross multiply
    1,027.28x = 1,537.72 × 738.64
  4. Step 4: Simplify right side
    1,027.28x = 1,135,821.50
  5. Step 5: Solve for x
    x = 1,135,821.50/1,027.28
  6. Step 6: Final answer
    x = 1,105.66

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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.