Home / 428,232.96-642,299.40-172,055.15

Finding the Fourth Proportional to 428,232.96, 642,299.40 and 172,055.15

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Solution

The fourth proportional to 428,232.96, 642,299.40 and 172,055.15 is: 258,062.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,232.96 : 642,299.40 = 172,055.15 : x
  2. Step 2: Convert to fraction form
    428,232.96/642,299.40 = 172,055.15/x
  3. Step 3: Cross multiply
    428,232.96x = 642,299.40 × 172,055.15
  4. Step 4: Simplify right side
    428,232.96x = 110,510,915,540.14
  5. Step 5: Solve for x
    x = 110,510,915,540.14/428,232.96
  6. Step 6: Final answer
    x = 258,062.61

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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.