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Finding the Fourth Proportional to 621,076.80, 857,157.36 and 345,462.48

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Solution

The fourth proportional to 621,076.80, 857,157.36 and 345,462.48 is: 476,777.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,076.80 : 857,157.36 = 345,462.48 : x
  2. Step 2: Convert to fraction form
    621,076.80/857,157.36 = 345,462.48/x
  3. Step 3: Cross multiply
    621,076.80x = 857,157.36 × 345,462.48
  4. Step 4: Simplify right side
    621,076.80x = 296,115,707,335.85
  5. Step 5: Solve for x
    x = 296,115,707,335.85/621,076.80
  6. Step 6: Final answer
    x = 476,777.92

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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.