Home / 428,234.90-642,302.30-172,057.09

Finding the Fourth Proportional to 428,234.90, 642,302.30 and 172,057.09

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Solution

The fourth proportional to 428,234.90, 642,302.30 and 172,057.09 is: 258,065.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,234.90 : 642,302.30 = 172,057.09 : x
  2. Step 2: Convert to fraction form
    428,234.90/642,302.30 = 172,057.09/x
  3. Step 3: Cross multiply
    428,234.90x = 642,302.30 × 172,057.09
  4. Step 4: Simplify right side
    428,234.90x = 110,512,664,638.31
  5. Step 5: Solve for x
    x = 110,512,664,638.31/428,234.90
  6. Step 6: Final answer
    x = 258,065.53

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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.