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Finding the Fourth Proportional to 712.49, 983.22 and 401.99

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Solution

The fourth proportional to 712.49, 983.22 and 401.99 is: 554.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.49 : 983.22 = 401.99 : x
  2. Step 2: Convert to fraction form
    712.49/983.22 = 401.99/x
  3. Step 3: Cross multiply
    712.49x = 983.22 × 401.99
  4. Step 4: Simplify right side
    712.49x = 395,237.68
  5. Step 5: Solve for x
    x = 395,237.68/712.49
  6. Step 6: Final answer
    x = 554.73

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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.