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Finding the Fourth Proportional to 259,493.90, 389,297.30 and 79,579.40

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Solution

The fourth proportional to 259,493.90, 389,297.30 and 79,579.40 is: 119,386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,493.90 : 389,297.30 = 79,579.40 : x
  2. Step 2: Convert to fraction form
    259,493.90/389,297.30 = 79,579.40/x
  3. Step 3: Cross multiply
    259,493.90x = 389,297.30 × 79,579.40
  4. Step 4: Simplify right side
    259,493.90x = 30,980,043,211.24
  5. Step 5: Solve for x
    x = 30,980,043,211.24/259,493.90
  6. Step 6: Final answer
    x = 119,386.40

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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.