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Finding the Fourth Proportional to 481,286, 721,929 and 131,078

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Solution

The fourth proportional to 481,286, 721,929 and 131,078 is: 196,617

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,286 : 721,929 = 131,078 : x
  2. Step 2: Convert to fraction form
    481,286/721,929 = 131,078/x
  3. Step 3: Cross multiply
    481,286x = 721,929 × 131,078
  4. Step 4: Simplify right side
    481,286x = 94,629,009,462
  5. Step 5: Solve for x
    x = 94,629,009,462/481,286
  6. Step 6: Final answer
    x = 196,617

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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.