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Finding the Fourth Proportional to 324,991.20, 486,536.40 and 231,679.20

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Solution

The fourth proportional to 324,991.20, 486,536.40 and 231,679.20 is: 346,841.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,991.20 : 486,536.40 = 231,679.20 : x
  2. Step 2: Convert to fraction form
    324,991.20/486,536.40 = 231,679.20/x
  3. Step 3: Cross multiply
    324,991.20x = 486,536.40 × 231,679.20
  4. Step 4: Simplify right side
    324,991.20x = 112,720,363,922.88
  5. Step 5: Solve for x
    x = 112,720,363,922.88/324,991.20
  6. Step 6: Final answer
    x = 346,841.28

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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.