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Finding the Fourth Proportional to 689, 951.30 and 482.28

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Solution

The fourth proportional to 689, 951.30 and 482.28 is: 665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    689 : 951.30 = 482.28 : x
  2. Step 2: Convert to fraction form
    689/951.30 = 482.28/x
  3. Step 3: Cross multiply
    689x = 951.30 × 482.28
  4. Step 4: Simplify right side
    689x = 458,792.96
  5. Step 5: Solve for x
    x = 458,792.96/689
  6. Step 6: Final answer
    x = 665.88

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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.