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Finding the Fourth Proportional to 1,082.25, 1,623.78 and 505.17

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Solution

The fourth proportional to 1,082.25, 1,623.78 and 505.17 is: 757.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.25 : 1,623.78 = 505.17 : x
  2. Step 2: Convert to fraction form
    1,082.25/1,623.78 = 505.17/x
  3. Step 3: Cross multiply
    1,082.25x = 1,623.78 × 505.17
  4. Step 4: Simplify right side
    1,082.25x = 820,284.94
  5. Step 5: Solve for x
    x = 820,284.94/1,082.25
  6. Step 6: Final answer
    x = 757.94

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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.