Home / 279,787.12-419,795.94-205,287.08

Finding the Fourth Proportional to 279,787.12, 419,795.94 and 205,287.08

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Solution

The fourth proportional to 279,787.12, 419,795.94 and 205,287.08 is: 308,015.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,787.12 : 419,795.94 = 205,287.08 : x
  2. Step 2: Convert to fraction form
    279,787.12/419,795.94 = 205,287.08/x
  3. Step 3: Cross multiply
    279,787.12x = 419,795.94 × 205,287.08
  4. Step 4: Simplify right side
    279,787.12x = 86,178,682,718.46
  5. Step 5: Solve for x
    x = 86,178,682,718.46/279,787.12
  6. Step 6: Final answer
    x = 308,015.19

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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.