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Finding the Fourth Proportional to 1,265.03, 1,745.74 and 892.65

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Solution

The fourth proportional to 1,265.03, 1,745.74 and 892.65 is: 1,231.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.03 : 1,745.74 = 892.65 : x
  2. Step 2: Convert to fraction form
    1,265.03/1,745.74 = 892.65/x
  3. Step 3: Cross multiply
    1,265.03x = 1,745.74 × 892.65
  4. Step 4: Simplify right side
    1,265.03x = 1,558,340.50
  5. Step 5: Solve for x
    x = 1,558,340.50/1,265.03
  6. Step 6: Final answer
    x = 1,231.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.