Home / 428,410.22-641,983.61-238,609.15

Finding the Fourth Proportional to 428,410.22, 641,983.61 and 238,609.15

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Solution

The fourth proportional to 428,410.22, 641,983.61 and 238,609.15 is: 357,561.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,410.22 : 641,983.61 = 238,609.15 : x
  2. Step 2: Convert to fraction form
    428,410.22/641,983.61 = 238,609.15/x
  3. Step 3: Cross multiply
    428,410.22x = 641,983.61 × 238,609.15
  4. Step 4: Simplify right side
    428,410.22x = 153,183,159,093.07
  5. Step 5: Solve for x
    x = 153,183,159,093.07/428,410.22
  6. Step 6: Final answer
    x = 357,561.87

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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.