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Finding the Fourth Proportional to 258,765.25, 388,016.60 and 118,403.59

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Solution

The fourth proportional to 258,765.25, 388,016.60 and 118,403.59 is: 177,545.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,765.25 : 388,016.60 = 118,403.59 : x
  2. Step 2: Convert to fraction form
    258,765.25/388,016.60 = 118,403.59/x
  3. Step 3: Cross multiply
    258,765.25x = 388,016.60 × 118,403.59
  4. Step 4: Simplify right side
    258,765.25x = 45,942,556,479.51
  5. Step 5: Solve for x
    x = 45,942,556,479.51/258,765.25
  6. Step 6: Final answer
    x = 177,545.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.