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Finding the Fourth Proportional to 666.28, 997.26 and 459.82

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Solution

The fourth proportional to 666.28, 997.26 and 459.82 is: 688.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.28 : 997.26 = 459.82 : x
  2. Step 2: Convert to fraction form
    666.28/997.26 = 459.82/x
  3. Step 3: Cross multiply
    666.28x = 997.26 × 459.82
  4. Step 4: Simplify right side
    666.28x = 458,560.09
  5. Step 5: Solve for x
    x = 458,560.09/666.28
  6. Step 6: Final answer
    x = 688.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.