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Finding the Fourth Proportional to 354,732.48, 489,711.42 and 273,978.72

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Solution

The fourth proportional to 354,732.48, 489,711.42 and 273,978.72 is: 378,230.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,732.48 : 489,711.42 = 273,978.72 : x
  2. Step 2: Convert to fraction form
    354,732.48/489,711.42 = 273,978.72/x
  3. Step 3: Cross multiply
    354,732.48x = 489,711.42 × 273,978.72
  4. Step 4: Simplify right side
    354,732.48x = 134,170,508,020.98
  5. Step 5: Solve for x
    x = 134,170,508,020.98/354,732.48
  6. Step 6: Final answer
    x = 378,230.12

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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.