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Finding the Fourth Proportional to 629.31, 938.29 and 575.04

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Solution

The fourth proportional to 629.31, 938.29 and 575.04 is: 857.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.31 : 938.29 = 575.04 : x
  2. Step 2: Convert to fraction form
    629.31/938.29 = 575.04/x
  3. Step 3: Cross multiply
    629.31x = 938.29 × 575.04
  4. Step 4: Simplify right side
    629.31x = 539,552.84
  5. Step 5: Solve for x
    x = 539,552.84/629.31
  6. Step 6: Final answer
    x = 857.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.