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Finding the Fourth Proportional to 694,055.60, 957,791.31 and 388,132.57

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Solution

The fourth proportional to 694,055.60, 957,791.31 and 388,132.57 is: 535,619.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,055.60 : 957,791.31 = 388,132.57 : x
  2. Step 2: Convert to fraction form
    694,055.60/957,791.31 = 388,132.57/x
  3. Step 3: Cross multiply
    694,055.60x = 957,791.31 × 388,132.57
  4. Step 4: Simplify right side
    694,055.60x = 371,750,002,673.97
  5. Step 5: Solve for x
    x = 371,750,002,673.97/694,055.60
  6. Step 6: Final answer
    x = 535,619.92

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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.