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Finding the Fourth Proportional to 707.29, 1,055.26 and 629.33

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Solution

The fourth proportional to 707.29, 1,055.26 and 629.33 is: 938.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.29 : 1,055.26 = 629.33 : x
  2. Step 2: Convert to fraction form
    707.29/1,055.26 = 629.33/x
  3. Step 3: Cross multiply
    707.29x = 1,055.26 × 629.33
  4. Step 4: Simplify right side
    707.29x = 664,098.75
  5. Step 5: Solve for x
    x = 664,098.75/707.29
  6. Step 6: Final answer
    x = 938.94

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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.