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Finding the Fourth Proportional to 489,505.88, 675,560.87 and 285,622.49

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Solution

The fourth proportional to 489,505.88, 675,560.87 and 285,622.49 is: 394,183.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,505.88 : 675,560.87 = 285,622.49 : x
  2. Step 2: Convert to fraction form
    489,505.88/675,560.87 = 285,622.49/x
  3. Step 3: Cross multiply
    489,505.88x = 675,560.87 × 285,622.49
  4. Step 4: Simplify right side
    489,505.88x = 192,955,373,030.05
  5. Step 5: Solve for x
    x = 192,955,373,030.05/489,505.88
  6. Step 6: Final answer
    x = 394,183.98

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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.