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Finding the Fourth Proportional to 317,456.33, 438,060.78 and 188,372.55

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Solution

The fourth proportional to 317,456.33, 438,060.78 and 188,372.55 is: 259,936.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,456.33 : 438,060.78 = 188,372.55 : x
  2. Step 2: Convert to fraction form
    317,456.33/438,060.78 = 188,372.55/x
  3. Step 3: Cross multiply
    317,456.33x = 438,060.78 × 188,372.55
  4. Step 4: Simplify right side
    317,456.33x = 82,518,626,183.59
  5. Step 5: Solve for x
    x = 82,518,626,183.59/317,456.33
  6. Step 6: Final answer
    x = 259,936.94

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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.