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Finding the Fourth Proportional to 492,639.37, 679,859.11 and 285,891.75

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Solution

The fourth proportional to 492,639.37, 679,859.11 and 285,891.75 is: 394,540.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,639.37 : 679,859.11 = 285,891.75 : x
  2. Step 2: Convert to fraction form
    492,639.37/679,859.11 = 285,891.75/x
  3. Step 3: Cross multiply
    492,639.37x = 679,859.11 × 285,891.75
  4. Step 4: Simplify right side
    492,639.37x = 194,366,109,281.88
  5. Step 5: Solve for x
    x = 194,366,109,281.88/492,639.37
  6. Step 6: Final answer
    x = 394,540.35

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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.