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Finding the Fourth Proportional to 515,940.90, 773,911.35 and 389,969.70

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Solution

The fourth proportional to 515,940.90, 773,911.35 and 389,969.70 is: 584,954.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,940.90 : 773,911.35 = 389,969.70 : x
  2. Step 2: Convert to fraction form
    515,940.90/773,911.35 = 389,969.70/x
  3. Step 3: Cross multiply
    515,940.90x = 773,911.35 × 389,969.70
  4. Step 4: Simplify right side
    515,940.90x = 301,801,976,986.10
  5. Step 5: Solve for x
    x = 301,801,976,986.10/515,940.90
  6. Step 6: Final answer
    x = 584,954.55

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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.