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Finding the Fourth Proportional to 1,861.38, 2,791.64 and 544.83

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Solution

The fourth proportional to 1,861.38, 2,791.64 and 544.83 is: 817.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.38 : 2,791.64 = 544.83 : x
  2. Step 2: Convert to fraction form
    1,861.38/2,791.64 = 544.83/x
  3. Step 3: Cross multiply
    1,861.38x = 2,791.64 × 544.83
  4. Step 4: Simplify right side
    1,861.38x = 1,520,966.50
  5. Step 5: Solve for x
    x = 1,520,966.50/1,861.38
  6. Step 6: Final answer
    x = 817.12

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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.