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Finding the Fourth Proportional to 1,262.36, 1,892.21 and 481.86

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Solution

The fourth proportional to 1,262.36, 1,892.21 and 481.86 is: 722.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.36 : 1,892.21 = 481.86 : x
  2. Step 2: Convert to fraction form
    1,262.36/1,892.21 = 481.86/x
  3. Step 3: Cross multiply
    1,262.36x = 1,892.21 × 481.86
  4. Step 4: Simplify right side
    1,262.36x = 911,780.31
  5. Step 5: Solve for x
    x = 911,780.31/1,262.36
  6. Step 6: Final answer
    x = 722.28

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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.