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Finding the Fourth Proportional to 388,765.30, 536,676.22 and 274,137.34

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Solution

The fourth proportional to 388,765.30, 536,676.22 and 274,137.34 is: 378,436.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,765.30 : 536,676.22 = 274,137.34 : x
  2. Step 2: Convert to fraction form
    388,765.30/536,676.22 = 274,137.34/x
  3. Step 3: Cross multiply
    388,765.30x = 536,676.22 × 274,137.34
  4. Step 4: Simplify right side
    388,765.30x = 147,122,991,392.06
  5. Step 5: Solve for x
    x = 147,122,991,392.06/388,765.30
  6. Step 6: Final answer
    x = 378,436.53

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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.