Home / 420,628.10-629,905.35-279,623.30

Finding the Fourth Proportional to 420,628.10, 629,905.35 and 279,623.30

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Solution

The fourth proportional to 420,628.10, 629,905.35 and 279,623.30 is: 418,745.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,628.10 : 629,905.35 = 279,623.30 : x
  2. Step 2: Convert to fraction form
    420,628.10/629,905.35 = 279,623.30/x
  3. Step 3: Cross multiply
    420,628.10x = 629,905.35 × 279,623.30
  4. Step 4: Simplify right side
    420,628.10x = 176,136,212,654.66
  5. Step 5: Solve for x
    x = 176,136,212,654.66/420,628.10
  6. Step 6: Final answer
    x = 418,745.71

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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.