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Finding the Fourth Proportional to 389,512.90, 537,770.82 and 251,763.94

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Solution

The fourth proportional to 389,512.90, 537,770.82 and 251,763.94 is: 347,591.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,512.90 : 537,770.82 = 251,763.94 : x
  2. Step 2: Convert to fraction form
    389,512.90/537,770.82 = 251,763.94/x
  3. Step 3: Cross multiply
    389,512.90x = 537,770.82 × 251,763.94
  4. Step 4: Simplify right side
    389,512.90x = 135,391,302,076.56
  5. Step 5: Solve for x
    x = 135,391,302,076.56/389,512.90
  6. Step 6: Final answer
    x = 347,591.32

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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.