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Finding the Fourth Proportional to 324,090.20, 486,135.30 and 305,719.40

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Solution

The fourth proportional to 324,090.20, 486,135.30 and 305,719.40 is: 458,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,090.20 : 486,135.30 = 305,719.40 : x
  2. Step 2: Convert to fraction form
    324,090.20/486,135.30 = 305,719.40/x
  3. Step 3: Cross multiply
    324,090.20x = 486,135.30 × 305,719.40
  4. Step 4: Simplify right side
    324,090.20x = 148,620,992,234.82
  5. Step 5: Solve for x
    x = 148,620,992,234.82/324,090.20
  6. Step 6: Final answer
    x = 458,579.10

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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.