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Finding the Fourth Proportional to 515,599.48, 773,436.21 and 215,778.25

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Solution

The fourth proportional to 515,599.48, 773,436.21 and 215,778.25 is: 323,682.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,599.48 : 773,436.21 = 215,778.25 : x
  2. Step 2: Convert to fraction form
    515,599.48/773,436.21 = 215,778.25/x
  3. Step 3: Cross multiply
    515,599.48x = 773,436.21 × 215,778.25
  4. Step 4: Simplify right side
    515,599.48x = 166,890,711,880.43
  5. Step 5: Solve for x
    x = 166,890,711,880.43/515,599.48
  6. Step 6: Final answer
    x = 323,682.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.