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Finding the Fourth Proportional to 695.21, 956.94 and 629.60

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Solution

The fourth proportional to 695.21, 956.94 and 629.60 is: 866.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.21 : 956.94 = 629.60 : x
  2. Step 2: Convert to fraction form
    695.21/956.94 = 629.60/x
  3. Step 3: Cross multiply
    695.21x = 956.94 × 629.60
  4. Step 4: Simplify right side
    695.21x = 602,489.42
  5. Step 5: Solve for x
    x = 602,489.42/695.21
  6. Step 6: Final answer
    x = 866.63

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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.