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Finding the Fourth Proportional to 612,540, 845,305.20 and 344,268

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Solution

The fourth proportional to 612,540, 845,305.20 and 344,268 is: 475,089.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,540 : 845,305.20 = 344,268 : x
  2. Step 2: Convert to fraction form
    612,540/845,305.20 = 344,268/x
  3. Step 3: Cross multiply
    612,540x = 845,305.20 × 344,268
  4. Step 4: Simplify right side
    612,540x = 291,011,530,593.60
  5. Step 5: Solve for x
    x = 291,011,530,593.60/612,540
  6. Step 6: Final answer
    x = 475,089.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.