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Finding the Fourth Proportional to 457,198.20, 684,485.10 and 280,051.20

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Solution

The fourth proportional to 457,198.20, 684,485.10 and 280,051.20 is: 419,273.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,198.20 : 684,485.10 = 280,051.20 : x
  2. Step 2: Convert to fraction form
    457,198.20/684,485.10 = 280,051.20/x
  3. Step 3: Cross multiply
    457,198.20x = 684,485.10 × 280,051.20
  4. Step 4: Simplify right side
    457,198.20x = 191,690,873,637.12
  5. Step 5: Solve for x
    x = 191,690,873,637.12/457,198.20
  6. Step 6: Final answer
    x = 419,273.03

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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.