Home / 428,160.12-642,330.36-161,914.74

Finding the Fourth Proportional to 428,160.12, 642,330.36 and 161,914.74

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Solution

The fourth proportional to 428,160.12, 642,330.36 and 161,914.74 is: 242,906.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,160.12 : 642,330.36 = 161,914.74 : x
  2. Step 2: Convert to fraction form
    428,160.12/642,330.36 = 161,914.74/x
  3. Step 3: Cross multiply
    428,160.12x = 642,330.36 × 161,914.74
  4. Step 4: Simplify right side
    428,160.12x = 104,002,753,233.51
  5. Step 5: Solve for x
    x = 104,002,753,233.51/428,160.12
  6. Step 6: Final answer
    x = 242,906.21

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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.