Home / 428,233.90-642,300.80-172,056.09

Finding the Fourth Proportional to 428,233.90, 642,300.80 and 172,056.09

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Solution

The fourth proportional to 428,233.90, 642,300.80 and 172,056.09 is: 258,064.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,233.90 : 642,300.80 = 172,056.09 : x
  2. Step 2: Convert to fraction form
    428,233.90/642,300.80 = 172,056.09/x
  3. Step 3: Cross multiply
    428,233.90x = 642,300.80 × 172,056.09
  4. Step 4: Simplify right side
    428,233.90x = 110,511,764,682.01
  5. Step 5: Solve for x
    x = 110,511,764,682.01/428,233.90
  6. Step 6: Final answer
    x = 258,064.03

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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.