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Finding the Fourth Proportional to 1,861.20, 2,791.71 and 562.63

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Solution

The fourth proportional to 1,861.20, 2,791.71 and 562.63 is: 843.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.20 : 2,791.71 = 562.63 : x
  2. Step 2: Convert to fraction form
    1,861.20/2,791.71 = 562.63/x
  3. Step 3: Cross multiply
    1,861.20x = 2,791.71 × 562.63
  4. Step 4: Simplify right side
    1,861.20x = 1,570,699.80
  5. Step 5: Solve for x
    x = 1,570,699.80/1,861.20
  6. Step 6: Final answer
    x = 843.92

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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.