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Finding the Fourth Proportional to 259,489.50, 389,408.94 and 91,011.39

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Solution

The fourth proportional to 259,489.50, 389,408.94 and 91,011.39 is: 136,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,489.50 : 389,408.94 = 91,011.39 : x
  2. Step 2: Convert to fraction form
    259,489.50/389,408.94 = 91,011.39/x
  3. Step 3: Cross multiply
    259,489.50x = 389,408.94 × 91,011.39
  4. Step 4: Simplify right side
    259,489.50x = 35,440,648,907.83
  5. Step 5: Solve for x
    x = 35,440,648,907.83/259,489.50
  6. Step 6: Final answer
    x = 136,578.35

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1.5x scale

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.