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Finding the Fourth Proportional to 388,765.29, 536,676.21 and 274,137.33

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Solution

The fourth proportional to 388,765.29, 536,676.21 and 274,137.33 is: 378,436.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,765.29 : 536,676.21 = 274,137.33 : x
  2. Step 2: Convert to fraction form
    388,765.29/536,676.21 = 274,137.33/x
  3. Step 3: Cross multiply
    388,765.29x = 536,676.21 × 274,137.33
  4. Step 4: Simplify right side
    388,765.29x = 147,122,983,283.92
  5. Step 5: Solve for x
    x = 147,122,983,283.92/388,765.29
  6. Step 6: Final answer
    x = 378,436.52

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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.