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Finding the Fourth Proportional to 489,299.98, 675,235.20 and 285,491.02

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Solution

The fourth proportional to 489,299.98, 675,235.20 and 285,491.02 is: 393,978.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,299.98 : 675,235.20 = 285,491.02 : x
  2. Step 2: Convert to fraction form
    489,299.98/675,235.20 = 285,491.02/x
  3. Step 3: Cross multiply
    489,299.98x = 675,235.20 × 285,491.02
  4. Step 4: Simplify right side
    489,299.98x = 192,773,585,987.90
  5. Step 5: Solve for x
    x = 192,773,585,987.90/489,299.98
  6. Step 6: Final answer
    x = 393,978.32

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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.