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Finding the Fourth Proportional to 712.04, 982.63 and 397.31

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Solution

The fourth proportional to 712.04, 982.63 and 397.31 is: 548.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.04 : 982.63 = 397.31 : x
  2. Step 2: Convert to fraction form
    712.04/982.63 = 397.31/x
  3. Step 3: Cross multiply
    712.04x = 982.63 × 397.31
  4. Step 4: Simplify right side
    712.04x = 390,404.31
  5. Step 5: Solve for x
    x = 390,404.31/712.04
  6. Step 6: Final answer
    x = 548.29

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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.