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Finding the Fourth Proportional to 343,481.20, 515,221.80 and 305,427.40

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Solution

The fourth proportional to 343,481.20, 515,221.80 and 305,427.40 is: 458,141.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,481.20 : 515,221.80 = 305,427.40 : x
  2. Step 2: Convert to fraction form
    343,481.20/515,221.80 = 305,427.40/x
  3. Step 3: Cross multiply
    343,481.20x = 515,221.80 × 305,427.40
  4. Step 4: Simplify right side
    343,481.20x = 157,362,854,797.32
  5. Step 5: Solve for x
    x = 157,362,854,797.32/343,481.20
  6. Step 6: Final answer
    x = 458,141.10

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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.