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Finding the Fourth Proportional to 545,198.43, 817,964.97 and 279,145.74

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Solution

The fourth proportional to 545,198.43, 817,964.97 and 279,145.74 is: 418,804.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,198.43 : 817,964.97 = 279,145.74 : x
  2. Step 2: Convert to fraction form
    545,198.43/817,964.97 = 279,145.74/x
  3. Step 3: Cross multiply
    545,198.43x = 817,964.97 × 279,145.74
  4. Step 4: Simplify right side
    545,198.43x = 228,331,432,754.90
  5. Step 5: Solve for x
    x = 228,331,432,754.90/545,198.43
  6. Step 6: Final answer
    x = 418,804.28

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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.