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Finding the Fourth Proportional to 279,905.30, 419,955.15 and 122,246.90

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Solution

The fourth proportional to 279,905.30, 419,955.15 and 122,246.90 is: 183,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,905.30 : 419,955.15 = 122,246.90 : x
  2. Step 2: Convert to fraction form
    279,905.30/419,955.15 = 122,246.90/x
  3. Step 3: Cross multiply
    279,905.30x = 419,955.15 × 122,246.90
  4. Step 4: Simplify right side
    279,905.30x = 51,338,215,226.54
  5. Step 5: Solve for x
    x = 51,338,215,226.54/279,905.30
  6. Step 6: Final answer
    x = 183,412.80

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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.