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Finding the Fourth Proportional to 629.62, 868.43 and 511.59

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Solution

The fourth proportional to 629.62, 868.43 and 511.59 is: 705.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.62 : 868.43 = 511.59 : x
  2. Step 2: Convert to fraction form
    629.62/868.43 = 511.59/x
  3. Step 3: Cross multiply
    629.62x = 868.43 × 511.59
  4. Step 4: Simplify right side
    629.62x = 444,284.64
  5. Step 5: Solve for x
    x = 444,284.64/629.62
  6. Step 6: Final answer
    x = 705.64

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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.