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Finding the Fourth Proportional to 1,243.53, 1,715.94 and 712.44

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Solution

The fourth proportional to 1,243.53, 1,715.94 and 712.44 is: 983.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.53 : 1,715.94 = 712.44 : x
  2. Step 2: Convert to fraction form
    1,243.53/1,715.94 = 712.44/x
  3. Step 3: Cross multiply
    1,243.53x = 1,715.94 × 712.44
  4. Step 4: Simplify right side
    1,243.53x = 1,222,504.29
  5. Step 5: Solve for x
    x = 1,222,504.29/1,243.53
  6. Step 6: Final answer
    x = 983.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.