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Finding the Fourth Proportional to 383,908.50, 529,508.10 and 281,901.96

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Solution

The fourth proportional to 383,908.50, 529,508.10 and 281,901.96 is: 388,814.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,908.50 : 529,508.10 = 281,901.96 : x
  2. Step 2: Convert to fraction form
    383,908.50/529,508.10 = 281,901.96/x
  3. Step 3: Cross multiply
    383,908.50x = 529,508.10 × 281,901.96
  4. Step 4: Simplify right side
    383,908.50x = 149,269,371,225.88
  5. Step 5: Solve for x
    x = 149,269,371,225.88/383,908.50
  6. Step 6: Final answer
    x = 388,814.97

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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.