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Finding the Fourth Proportional to 711.52, 982.67 and 449.69

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Solution

The fourth proportional to 711.52, 982.67 and 449.69 is: 621.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.52 : 982.67 = 449.69 : x
  2. Step 2: Convert to fraction form
    711.52/982.67 = 449.69/x
  3. Step 3: Cross multiply
    711.52x = 982.67 × 449.69
  4. Step 4: Simplify right side
    711.52x = 441,896.87
  5. Step 5: Solve for x
    x = 441,896.87/711.52
  6. Step 6: Final answer
    x = 621.06

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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.