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Finding the Fourth Proportional to 351,900.15, 485,308.65 and 274,395

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Solution

The fourth proportional to 351,900.15, 485,308.65 and 274,395 is: 378,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,900.15 : 485,308.65 = 274,395 : x
  2. Step 2: Convert to fraction form
    351,900.15/485,308.65 = 274,395/x
  3. Step 3: Cross multiply
    351,900.15x = 485,308.65 × 274,395
  4. Step 4: Simplify right side
    351,900.15x = 133,166,267,016.75
  5. Step 5: Solve for x
    x = 133,166,267,016.75/351,900.15
  6. Step 6: Final answer
    x = 378,420.60

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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.