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Finding the Fourth Proportional to 1,861.25, 2,791.45 and 544.73

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Solution

The fourth proportional to 1,861.25, 2,791.45 and 544.73 is: 816.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.25 : 2,791.45 = 544.73 : x
  2. Step 2: Convert to fraction form
    1,861.25/2,791.45 = 544.73/x
  3. Step 3: Cross multiply
    1,861.25x = 2,791.45 × 544.73
  4. Step 4: Simplify right side
    1,861.25x = 1,520,569.88
  5. Step 5: Solve for x
    x = 1,520,569.88/1,861.25
  6. Step 6: Final answer
    x = 816.96

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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.