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Finding the Fourth Proportional to 2,753.24, 4,129.85 and 805.44

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Solution

The fourth proportional to 2,753.24, 4,129.85 and 805.44 is: 1,208.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.24 : 4,129.85 = 805.44 : x
  2. Step 2: Convert to fraction form
    2,753.24/4,129.85 = 805.44/x
  3. Step 3: Cross multiply
    2,753.24x = 4,129.85 × 805.44
  4. Step 4: Simplify right side
    2,753.24x = 3,326,346.38
  5. Step 5: Solve for x
    x = 3,326,346.38/2,753.24
  6. Step 6: Final answer
    x = 1,208.16

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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.