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Finding the Fourth Proportional to 715.64, 1,067.24 and 629.37

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Solution

The fourth proportional to 715.64, 1,067.24 and 629.37 is: 938.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.64 : 1,067.24 = 629.37 : x
  2. Step 2: Convert to fraction form
    715.64/1,067.24 = 629.37/x
  3. Step 3: Cross multiply
    715.64x = 1,067.24 × 629.37
  4. Step 4: Simplify right side
    715.64x = 671,690.41
  5. Step 5: Solve for x
    x = 671,690.41/715.64
  6. Step 6: Final answer
    x = 938.59

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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.