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Finding the Fourth Proportional to 2,753.12, 4,129.68 and 805.33

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Solution

The fourth proportional to 2,753.12, 4,129.68 and 805.33 is: 1,207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.12 : 4,129.68 = 805.33 : x
  2. Step 2: Convert to fraction form
    2,753.12/4,129.68 = 805.33/x
  3. Step 3: Cross multiply
    2,753.12x = 4,129.68 × 805.33
  4. Step 4: Simplify right side
    2,753.12x = 3,325,740.15
  5. Step 5: Solve for x
    x = 3,325,740.15/2,753.12
  6. Step 6: Final answer
    x = 1,207.99

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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.