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Finding the Fourth Proportional to 712.73, 983.54 and 418.03

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Solution

The fourth proportional to 712.73, 983.54 and 418.03 is: 576.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.73 : 983.54 = 418.03 : x
  2. Step 2: Convert to fraction form
    712.73/983.54 = 418.03/x
  3. Step 3: Cross multiply
    712.73x = 983.54 × 418.03
  4. Step 4: Simplify right side
    712.73x = 411,149.23
  5. Step 5: Solve for x
    x = 411,149.23/712.73
  6. Step 6: Final answer
    x = 576.87

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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.