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Finding the Fourth Proportional to 2,269.99, 3,405.12 and 808.75

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Solution

The fourth proportional to 2,269.99, 3,405.12 and 808.75 is: 1,213.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,269.99 : 3,405.12 = 808.75 : x
  2. Step 2: Convert to fraction form
    2,269.99/3,405.12 = 808.75/x
  3. Step 3: Cross multiply
    2,269.99x = 3,405.12 × 808.75
  4. Step 4: Simplify right side
    2,269.99x = 2,753,890.80
  5. Step 5: Solve for x
    x = 2,753,890.80/2,269.99
  6. Step 6: Final answer
    x = 1,213.17

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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.