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Finding the Fourth Proportional to 519,743, 717,245.34 and 281,279

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Solution

The fourth proportional to 519,743, 717,245.34 and 281,279 is: 388,165.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,743 : 717,245.34 = 281,279 : x
  2. Step 2: Convert to fraction form
    519,743/717,245.34 = 281,279/x
  3. Step 3: Cross multiply
    519,743x = 717,245.34 × 281,279
  4. Step 4: Simplify right side
    519,743x = 201,746,051,989.86
  5. Step 5: Solve for x
    x = 201,746,051,989.86/519,743
  6. Step 6: Final answer
    x = 388,165.02

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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.