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Finding the Fourth Proportional to 711.68, 982.04 and 401.18

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Solution

The fourth proportional to 711.68, 982.04 and 401.18 is: 553.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.68 : 982.04 = 401.18 : x
  2. Step 2: Convert to fraction form
    711.68/982.04 = 401.18/x
  3. Step 3: Cross multiply
    711.68x = 982.04 × 401.18
  4. Step 4: Simplify right side
    711.68x = 393,974.81
  5. Step 5: Solve for x
    x = 393,974.81/711.68
  6. Step 6: Final answer
    x = 553.58

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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.