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Finding the Fourth Proportional to 489,373.74, 675,196.92 and 285,433.56

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Solution

The fourth proportional to 489,373.74, 675,196.92 and 285,433.56 is: 393,817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,373.74 : 675,196.92 = 285,433.56 : x
  2. Step 2: Convert to fraction form
    489,373.74/675,196.92 = 285,433.56/x
  3. Step 3: Cross multiply
    489,373.74x = 675,196.92 × 285,433.56
  4. Step 4: Simplify right side
    489,373.74x = 192,723,860,576.64
  5. Step 5: Solve for x
    x = 192,723,860,576.64/489,373.74
  6. Step 6: Final answer
    x = 393,817.33

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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.