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Finding the Fourth Proportional to 259,740.25, 389,649.33 and 91,230.88

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Solution

The fourth proportional to 259,740.25, 389,649.33 and 91,230.88 is: 136,860.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,740.25 : 389,649.33 = 91,230.88 : x
  2. Step 2: Convert to fraction form
    259,740.25/389,649.33 = 91,230.88/x
  3. Step 3: Cross multiply
    259,740.25x = 389,649.33 × 91,230.88
  4. Step 4: Simplify right side
    259,740.25x = 35,548,051,267.31
  5. Step 5: Solve for x
    x = 35,548,051,267.31/259,740.25
  6. Step 6: Final answer
    x = 136,860.00

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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.