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Finding the Fourth Proportional to 515,812.28, 773,469.56 and 216,212.40

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Solution

The fourth proportional to 515,812.28, 773,469.56 and 216,212.40 is: 324,214.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,812.28 : 773,469.56 = 216,212.40 : x
  2. Step 2: Convert to fraction form
    515,812.28/773,469.56 = 216,212.40/x
  3. Step 3: Cross multiply
    515,812.28x = 773,469.56 × 216,212.40
  4. Step 4: Simplify right side
    515,812.28x = 167,233,709,894.54
  5. Step 5: Solve for x
    x = 167,233,709,894.54/515,812.28
  6. Step 6: Final answer
    x = 324,214.29

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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.