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Finding the Fourth Proportional to 260,879.40, 391,403.16 and 118,775.52

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Solution

The fourth proportional to 260,879.40, 391,403.16 and 118,775.52 is: 178,201.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,879.40 : 391,403.16 = 118,775.52 : x
  2. Step 2: Convert to fraction form
    260,879.40/391,403.16 = 118,775.52/x
  3. Step 3: Cross multiply
    260,879.40x = 391,403.16 × 118,775.52
  4. Step 4: Simplify right side
    260,879.40x = 46,489,113,858.64
  5. Step 5: Solve for x
    x = 46,489,113,858.64/260,879.40
  6. Step 6: Final answer
    x = 178,201.55

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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.