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Finding the Fourth Proportional to 383,912.22, 529,513.29 and 281,905.68

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Solution

The fourth proportional to 383,912.22, 529,513.29 and 281,905.68 is: 388,820.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,912.22 : 529,513.29 = 281,905.68 : x
  2. Step 2: Convert to fraction form
    383,912.22/529,513.29 = 281,905.68/x
  3. Step 3: Cross multiply
    383,912.22x = 529,513.29 × 281,905.68
  4. Step 4: Simplify right side
    383,912.22x = 149,272,804,086.49
  5. Step 5: Solve for x
    x = 149,272,804,086.49/383,912.22
  6. Step 6: Final answer
    x = 388,820.14

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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.