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Finding the Fourth Proportional to 259,634.80, 389,408.04 and 72,602.80

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Solution

The fourth proportional to 259,634.80, 389,408.04 and 72,602.80 is: 108,891.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,634.80 : 389,408.04 = 72,602.80 : x
  2. Step 2: Convert to fraction form
    259,634.80/389,408.04 = 72,602.80/x
  3. Step 3: Cross multiply
    259,634.80x = 389,408.04 × 72,602.80
  4. Step 4: Simplify right side
    259,634.80x = 28,272,114,046.51
  5. Step 5: Solve for x
    x = 28,272,114,046.51/259,634.80
  6. Step 6: Final answer
    x = 108,891.85

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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.