Home / 428,233.15-642,299.68-172,055.34

Finding the Fourth Proportional to 428,233.15, 642,299.68 and 172,055.34

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Solution

The fourth proportional to 428,233.15, 642,299.68 and 172,055.34 is: 258,062.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,233.15 : 642,299.68 = 172,055.34 : x
  2. Step 2: Convert to fraction form
    428,233.15/642,299.68 = 172,055.34/x
  3. Step 3: Cross multiply
    428,233.15x = 642,299.68 × 172,055.34
  4. Step 4: Simplify right side
    428,233.15x = 110,511,089,071.55
  5. Step 5: Solve for x
    x = 110,511,089,071.55/428,233.15
  6. Step 6: Final answer
    x = 258,062.90

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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.