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Finding the Fourth Proportional to 519,911.15, 717,093.56 and 328,740

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Solution

The fourth proportional to 519,911.15, 717,093.56 and 328,740 is: 453,418.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,911.15 : 717,093.56 = 328,740 : x
  2. Step 2: Convert to fraction form
    519,911.15/717,093.56 = 328,740/x
  3. Step 3: Cross multiply
    519,911.15x = 717,093.56 × 328,740
  4. Step 4: Simplify right side
    519,911.15x = 235,737,335,270.70
  5. Step 5: Solve for x
    x = 235,737,335,270.70/519,911.15
  6. Step 6: Final answer
    x = 453,418.51

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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.