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Finding the Fourth Proportional to 641.33, 888.75 and 629.02

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Solution

The fourth proportional to 641.33, 888.75 and 629.02 is: 871.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.33 : 888.75 = 629.02 : x
  2. Step 2: Convert to fraction form
    641.33/888.75 = 629.02/x
  3. Step 3: Cross multiply
    641.33x = 888.75 × 629.02
  4. Step 4: Simplify right side
    641.33x = 559,038.38
  5. Step 5: Solve for x
    x = 559,038.38/641.33
  6. Step 6: Final answer
    x = 871.69

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.